Relevant bibliographies by topics / Half-metal

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Half-metal'

Author: Grafiati
Published: 4 June 2021
Last updated: 7 September 2023

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Journal articles on the topic "Half-metal"

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Osborne, Ian S. "Half Metal, Full Spin." Science 325, no. 5936 (July 2, 2009): 13.1–13. http://dx.doi.org/10.1126/science.325_13a.

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Ren, C. D., K. S. Chan, and J. Wang. "Anomalous quantized conductance in a half-metal/topological superconductor/half-metal junction." Journal of Physics: Condensed Matter 26, no. 17 (April 11, 2014): 175702. http://dx.doi.org/10.1088/0953-8984/26/17/175702.

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BAI, J., and X. C. ZENG. "SILICON-BASED HALF-METAL: METAL-ENCAPSULATED SILICON NANOTUBE." Nano 02, no. 02 (April 2007): 109–14. http://dx.doi.org/10.1142/s179329200700043x.

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We performed first-principles calculation to show that a host–guest silicon nanostructure can exhibit half-metallic properties, wherein the host is a single-walled hexagonal silicon nanotube while the guest is a hybrid atomic chain of Mn and Co (encapsulated in the host nanotube). The calculated electronic band structures indicate that the Fermi level intersects only in the spin-up band, whereas the spin-down band exhibits semiconducting characteristics.
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Szotek, Z., W. M. Temmerman, A. Svane, L. Petit, G. M. Stocks, and H. Winter. "Half-metallic transition metal oxides." Journal of Magnetism and Magnetic Materials 272-276 (May 2004): 1816–17. http://dx.doi.org/10.1016/j.jmmm.2003.12.818.

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Tagani, Meysam Bagheri, and Sahar Izadi Vishkayi. "Polyaniline (C3N) nanoribbons: Magnetic metal, semiconductor, and half-metal." Journal of Applied Physics 124, no. 8 (August 28, 2018): 084304. http://dx.doi.org/10.1063/1.5042207.

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Ohtsuki, Tsutomu, Hideyuki Yuki, Jirohta Kasagi, and Masakatsu Muto. "Half-Life of7Be in Beryllium Metal." Progress of Theoretical Physics Supplement 154 (2004): 392–96. http://dx.doi.org/10.1143/ptps.154.392.

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Tewari, Girish C., Divya Srivastava, Reijo Pohjonen, Otto Mustonen, Antti J. Karttunen, Johan Lindén, and Maarit Karppinen. "Fe3Se4: a possible ferrimagnetic half-metal?" Journal of Physics: Condensed Matter 32, no. 45 (August 19, 2020): 455801. http://dx.doi.org/10.1088/1361-648x/aba3ef.

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Song, Weiyu, Erjun Zhao, Jian Meng, and Zhijian Wu. "Near compensated half-metal in Sr2NiOsO6." Journal of Chemical Physics 130, no. 11 (March 21, 2009): 114707. http://dx.doi.org/10.1063/1.3092485.

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Guo, Lingju, Xiaohong Zheng, and Zhi Zeng. "Transition metal encapsulated hydrogenated silicon nanotubes: Silicon-based half-metal." Physics Letters A 375, no. 47 (November 2011): 4209–13. http://dx.doi.org/10.1016/j.physleta.2011.10.005.

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Luo, Hongzhi, Bohua Liu, Shijie Li, Yuepeng Xin, Fanbin Meng, Heyan Liu, and Enke Liu. "Is Heusler alloy Ti2NiAl a half-metal." Solid State Communications 292 (April 2019): 7–10. http://dx.doi.org/10.1016/j.ssc.2019.01.016.

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Dissertations / Theses on the topic "Half-metal"

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Guillemard, Charles. "Half-metal magnets Heusler compounds for spintronics." Thesis, Université de Lorraine, 2019. http://www.theses.fr/2019LORR0110.

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L'amélioration des techniques de dépôts et l’évolution de la compréhension de la physique de la matière condensée a conduit à la découverte de phénomènes nouveaux en électronique de spin (spintronique). En particulier, le retournement de l’aimantation par couple de transfert de spin et couple spin-orbite, ainsi que le développement de dispositifs basés sur la propagation d’ondes de spin ont fait de l’amortissement magnétique de Gilbert un paramètre central pour les futures technologies de stockage et de traitement de l’information. Dans cette étude, la prédiction de valeurs très faibles d’amortissement dans les alliages d’Heusler demi métaux magnétiques Co2MnZ est expérimentalement observée et directement corrélée à la structure électronique sous-jacente. En effet, en substituant l’élément Z dans des couches minces monocristallines de haute qualité de Co2MnZ (Z= Al, Si, Ga, Ge, Sn, Sb) faites par épitaxie par jet moléculaire, les propriétés électroniques telles que le gap de spin minoritaire, la position du niveau de Fermi et la polarisation en spin peuvent être accordées et leurs conséquences sur la dynamique de l’aimantation sont analysées. Les résultats expérimentaux nous permettent de comprendre la relation existante entre la structure électronique mesurée et la valeur d’amortissement magnétique, ainsi que de les comparer aux calculs ab initio. Les valeurs d’amortissement entre 4.1 x10-4 et 9 x10-4 pour Co2MnSi, Co2MnGe, Co2MnSn et Co2MnSb sont les plus petites valeurs jamais reportées pour des couches conductrices et constituent une preuve expérimentale qui confirme les prédictions théoriques sur ces alliages d’Heusler demi métaux magnétiques. Ensuite, la relation entre l’amortissement magnétique de Gilbert et le temps de désaimantation ultra-rapide induit par pulse laser dans la série d’alliages quaternaires Co2MnSixAl1-x à polarisation en spin variable est étudiée. Cette partie vise à vérifier des modèles théoriques qui essaient d’unifier ces deux quantités vivant sur des échelles de temps différentes. Finalement, les propriétés structurales et magnétiques de super réseaux Mn3Ga/Co2YZ sont étudiées dans le but de combiner un amortissement de Gilbert très faible, un gap de spin minoritaire ainsi que l’aimantation perpendiculaire aux plans des couches, une caractéristique indispensable pour des dispositifs à faible consommation d’énergie
Improvements in thin film elaboration methods and a deeper understanding of condensed matter physics have led to new exciting phenomena in spin electronics (spintronics). In particular, magnetization reversal by spin-orbit and spin-transfer torque as well as the development of spin waves based devices have placed the Gilbert magnetic damping coefficient as a key parameter for future data storage and information processing technologies. The prediction of ultralow magnetic damping in Co2MnZ Heusler half-metal magnets is explored in this study and the damping response is shown to be linked to the underlying electronic structure. By substitution of the Z element in high quality Co2MnZ (Z=Al, Si, Ga, Ge, Sn and Sb) epitaxial thin films grown by molecular beam epitaxy, electronic properties such as the minority-spin band gap, Fermi energy position in the band gap, and spin polarization can be tuned and the consequences for magnetization dynamics analyzed. Experimental results allow us to directly explore the interplay of spin polarization, spin gap and Fermi energy position, with the magnetic damping obtained in these films (together with predictions from ab initio calculations). The ultralow magnetic damping coefficients measured in the range from 4.1 x10-4 to 9 x10-4 for Co2MnSi, Co2MnGe, Co2MnSn and Co2MnSb are the lowest values ever reported in conductive layers and offer a clear experimental demonstration of theoretical predictions on half metal magnetic Heusler compounds. Then, the relation between the Gilbert damping and the ultrafast demagnetization time in quaternary Co2MnSixAl1-x compounds with a tunable spin polarization is analyzed. This way, it is possible to confront theoretical models unifying those two quantities that live in different timescales. Finally, structural and magnetic properties of Mn3Ga/Co2YZ Heusler superlattices are investigated in order to combine ultralow Gilbert damping coefficient, minority spin band gap and perpendicularly magnetized heterostructures, another requirement for low energy consumption devices. Through the present work, we aim to prove that Heusler compounds provide an excellent playground to study fundamental magnetism and offer a pathway for future materials design
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Lu, Xianyang. "Ultrafast laser-induced magnetisation dynamics : Gilbert damping of metal and half-metal." Thesis, University of York, 2018. http://etheses.whiterose.ac.uk/22780/.

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In this thesis, the magnetic damping in different metals and half-metals is studied using an all-optical pump-probe method: the time-resolved magneto-optic Kerr effect (TR-MOKE), combined with several advanced characterization techniques, such as angle-resolved photoemission spectroscopy (APRES) and X-ray magnetic circular dichroism (XMCD). In Fe/Cr/GaAs heterostructures, the uniaxial magnetic anisotropy (UMA) and the magnetic damping have been studied as a function of the thickness of Cr interlayer. The UMA is attributed to the Fe-GaAs chemical bonding at the interface via increasing the orbit moments of Fe atoms. The Cr interlayer with increasing thickness blocks the Fe-GaAs bonding and the UMA gradually. The magnetic damping shows a dramatic drop when Cr interlayer is deposited, even with only 0.5 ML. The results have indicated that the UMA and the damping originate from different mechanisms although the Fe/GaAs interface plays an important role in both phenomena. The correlation between magnetic damping and the electronic structures have been investigated in Co2FeAl Heusler alloy. By varying the growth temperature, both the magnetic damping and the electronic structure have been found affected significantly. It is experimentally demonstrated that the low damping constant originates from a low density of state (DOS) at Fermi level. A "shoulder-like" peak in the vicinity of Fermi level in the energy distribution curve would enhance the DOS and the damping. A pair of half-metallic Fe3O4 films, with and without structural defects, have been compared in order to investigate the effect of defects in magnetic damping. The enhancement of the intrinsic damping 0.063 in defect-free Fe3O4 sample is attributed to the emergence of the perpendicular standing spin wave (PSSW), while the magnetic damping in the as-grown sample 0.039 is lower because the defects would scatter the spin wave or magnon and the energy transfer channel from the uniform precession to the PSSW does not exist.
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Millichamp, Thomas Edward. "A bulk half-metal and an unexpected Fermi surface." Thesis, University of Bristol, 2017. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.723472.

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Maddox, Tania Patricia. "Thermal and photochemical reactions of half sandwich transition metal complexes." Thesis, University of York, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.284128.

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Love, Christopher. "Correlating magnetic damping and microstructure in "half metal" thin films." Thesis, University of York, 2018. http://etheses.whiterose.ac.uk/22743/.

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Highly spin-polarised materials show great promise in applied spintronics as spin-filters and spin transfer torque magnetic random-access memory devices for data storage. However, controllable magnetisation switching requires materials with a low Gilbert damping parameter and stable magnetic properties at room temperature. Two highly spin-polarised magnetic materials with critical temperatures well above room temperature are characterised using a series of structural and magnetic analysis techniques. Correlation between the magnetic damping and microstructure is observed in both Fe3O4 and Co2FeAl0.5Si0.5 samples and both are seen to improve structurally and show more favourable damping parameters with annealing. Annealing Fe3O4 in CO/CO2 is shown to reduce the antiphase boundary density and decrease the two-magnon scattering-like extrinsic damping effects. The quality of the sample structure and the stoichiometry is also seen to improve considerably after the annealing although the defects are not completely eliminated. An anomalous peak in the damping of the annealed film is observed at 10GHz Co2FeAl0.5Si0.5 grown on germanium and silicon substrates is seen to also improve with thermal annealing. The Gilbert damping is seen to be lower in the as-grown scheme using the silicon substrate but greater reduction of damping post-annealing is seen on germanium. In both cases the B2 order is observed in the Co2FeAl0.5Si0.5 thin films, and intermixing between the sample and substrate observed above 500oC is sufficient to disrupt the crystal structure and introduce significant extrinsic damping effects which increase the total damping. This prevents the Co2FeAl0.5Si0.5 from reaching the more desirable L21 structure.
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Kaster, Brian C. "Magnetic Properties of Co1-xFexS2." Miami University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=miami1311874514.

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Paula, Cássio Remus de. "VIDEOGAMES E FICÇÃO CIENTÍFICA: REPRESENTAÇÕES DO FUTURO CAÓTICO NAS SÉRIES HALF-LIFE E METAL GEAR SOLID." UNIVERSIDADE ESTADUAL DE PONTA GROSSA, 2017. http://tede2.uepg.br/jspui/handle/prefix/392.

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Made available in DSpace on 2017-07-21T14:49:48Z (GMT). No. of bitstreams: 1 Cassio Remus de Paula.pdf: 3599048 bytes, checksum: c2a5798d4f2ef0461b5f36e8d87a4099 (MD5) Previous issue date: 2017-02-24
The current thesis seeks to demonstrate the relations of dystopias and scientific fiction notions with the virtual game series Half-Life and Metal Gear Solid, in addiction to understanding significant game titles in their influence. Such notions are problematized from the historical research of the scientific fictions, derived from literature and cinema, such as the own science conceptions during the 19th and 20th centuries. Therefore, theoretical-methodological sources referred to the ludism, cinema and representation are used in order to establish the notions of dystopia presented in the specified games, in a link with the concepts of the pessimistic future existed in the scientific and artistic imaginary.
A presente dissertação procura demonstrar as relações das noções de distopias e ficção científica com as séries de jogos virtuais Half-Life e Metal Gear Solid, além de compreender títulos significativos de games na influência dos mesmos. Tais noções são problematizadas a partir do estudo histórico das ficções científicas, provenientes da literatura e do cinema, assim como das próprias concepções de ciência dos séculos XIX e XX. Para tanto, utilizam-se fontes teórico-metodológicas referentes ao estudo do ludismo, cinema e representação, a fim de estabelecer as noções de distopia apresentados nos jogos em específico em vínculo com as concepções de futuro de maneira pessimista, presentes no imaginário tanto científico quanto artístico.
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Paudel, Moti Raj. "A comprehensive experimental study of the quaternary Heusler alloy cobalt-manganese-tin-antimony : a potential half-metal /." Available to subscribers only, 2008. http://proquest.umi.com/pqdweb?did=1597633341&sid=5&Fmt=2&clientId=1509&RQT=309&VName=PQD.

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Harnagea, Luminita. "Propriétés structurales et de transport de pérovskites doubles Sr2FeMoO6 élaborées par chimie douce." Paris 11, 2009. http://www.theses.fr/2009PA112004.

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La pérovskite double Sr2FeMoO6 présente un caractère demi – métallique, une température de Curie centrée autour de 400 K et une magnétorésistance assez importante en champ faible à température ambiante, ce qui permet d’envisager des applications dans le domaine de l’électronique de spin. Cependant, les difficultés de préparation des échantillons de façon reproductible et la nécessité d’avoir une magnétorésistance la plus élevée possible en champ faible et à température ambiante constituent des facteurs qui limitent actuellement la fabrication de dispositifs. Dans le but de surmonter ces difficultés et d’optimiser la magnétorésistance de ce composé nous avons entrepris sa préparation par une voie de type citrate et avons caractérisé ses propriétés physico - chimiques (structurales, microstructurales, magnétiques et de transport). En modifiant successivement les paramètres du protocole de préparation nous avons mis en évidence l’importance des conditions de synthèse sur les propriétés physico-chimiques de ce matériau et nous avons réussi à trouver des conditions de préparation favorables à l’amélioration des propriétés magnétorésistives. Nos résultats indiquent une amélioration de la magnétorésistance sous champ faible (6% à 300 K sous 1 kOe) et sont comparables à ceux rapportés dans la littérature ou meilleurs que ceux-ci. Un résultat remarquable est la persistance de la magnétorésistance même à 400 K pour tous nos échantillons. L’étude des compositions de type Sr2-xFeMoO6 (x = 0. 02, 0. 04) et Sr2+xFeMoO6+x (x = 0. 02, 0. 04, 0. 10) nous a permis de trouver d’autres conditions favorables à d’effets magnétorésistifs importants
The double perovskite Sr2FeMoO6 exhibits a half-metallic character with a Curie temperature of around 400 K and an appreciably large low-field magnetoresistance (LFMR) at room-temperature (RT). Because of these properties, this compound is generally considered as a promising candidate for spintronic devices. However, the difficulties in preparing reproducible samples, and also, the need to increase further the LFMR at RT, constitute the limiting factors for device applications. With the aim to overcome theses difficulties and to enhance the magnetoresistance of this compound further, we carried out synthesis and physico-chemical characterization of Sr2FeMoO6 samples prepared using a citrate route. We studied the influence of various parameters used in the citrate route on the physico-chemical properties of our Sr2FeMoO6 samples, which successfully led us to the optimization of the magnetoresistive properties of this compound. In our samples we obtained a magnetoresistance value of about 6% at 300 K under a field of 1 kOe, which is similar to or better than the best reported values. Another distinguishing feature of our samples is the existence of magnetoresistance that persists up to at least 400 K. Similar studies, on the compositions Sr2-xFeMoO6 (x = 0. 02, 0. 04) and Sr2+xFeMoO6+x (x = 0. 02, 0. 04, 0. 10), provided us with the opportunity to discover others conditions that are important in the magnetoresistive effect in Sr2FeMoO6
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Fugattini, Silvio. "Studio mediante magnetometro moke di film sottili di manganite per applicazioni in spintronica." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amslaurea.unibo.it/8334/.

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In questo lavoro di tesi è stata studiata l'anisotropia magnetica di film sottili epitassiali di La0.7Sr0.3MnO3 (LSMO), cresciuti con la tecnica Channel Spark Ablation su substrati monocristallini di SrTiO3 (001). L'interesse nei confronti di questi materiali nasce dal fatto che, grazie alla loro proprietà di half-metallicity, sono usati come iniettori di spin in dispositivi per applicazioni in spintronica, l'elettronica che considera elemento attivo per l'informazione non solo la carica elettrica ma anche lo spin dei portatori. Un tipico esempio di dispositivo spintronico è la valvola di spin (un dispositivo costituito da due film ferromagnetici metallici separati da uno strato conduttore o isolante) il cui stato resistivo dipende dall'orientazione relativa dei vettori magnetizzazione (parallela o antiparallela) degli strati ferromagnetici. E’ quindi di fondamentale importanza conoscere i meccanismi di magnetizzazione dei film che fungono da iniettori di spin. Questa indagine è stata effettuata misurando cicli di isteresi magnetica grazie ad un magnetometro MOKE (magneto-optical Kerr effect). Le misure di campo coercitivo e della magnetizzazione di rimanenza al variare dell'orientazione del campo rispetto al campione, permettono di identificare l'anisotropia, cioè gli assi di facile e difficile magnetizzazione. I risultati delle misure indicano una diversa anisotropia in funzione dello spessore del film: anisotropia biassiale (cioè con due assi facili di magnetizzazione) per film spessi 40 nm e uniassiale (un asse facile) per film spessi 20 nm. L'anisotropia biassiale viene associata allo strain che il substrato cristallino induce nel piano del film, mentre l'origine dell'uniassialità trova la giustificazione più probabile nella morfologia del substrato, in particolare nella presenza di terrazzamenti che potrebbero indurre una step-induced anisotropy. Il contributo di questi fattori di anisotropia alla magnetizzazione è stato studiato anche in temperatura.
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Books on the topic "Half-metal"

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Lloyd, Lloyd M. The varieties of 1854 New Orleans Liberty seated half dollars. [United States]: L.M. Lloyd, 1998.

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Canada, Atomic Energy of. Casting technique development for half-scale metal-matrix fuel isolation containers. Ottawa, Ont: Atomic Energy of Canada Limited, 1986.

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1920-, Basolo Fred, and Burmeister John L, eds. On being well-coordinated: A half-century of research on transition metal complexes : selected papers of Fred Basolo. River Edge, N.J: World Scientific Pub., 2003.

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Metal/Nonmetal Fatalities Second Half--2002, OT 12. [S.l: s.n., 2003.

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Half-century of metal- and metalloid-containing polymers. Hoboken, N.J: Wiley-Interscience, 2003.

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Abd-El-Aziz, Alaa S., Charles E. Jr Carraher, Charles U. Jr Pittman, John E. Sheats, and Martel Zeldin. Macromolecules Containing Metal and Metal-Like Elements, A Half-Century of Metal- and Metalloid-Containing Polymers (Macromolecules Containing Metal and Metal-like Elements). Wiley-Interscience, 2003.

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Abd-El-Aziz, Alaa S., John E. Sheats, Martel Zeldin, Charles E. Jr Carraher, and Charles U. Jr Pittman. Macromolecules Containing Metal and Metal-Like Elements, Volume 1: A Half-Century of Metal- and Metalloid-Containing Polymers. Wiley & Sons, Incorporated, John, 2007.

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Abd-El-Aziz, Alaa S., John E. Sheats, Martel Zeldin, Carraher Charles E. Jr, and Pittman Charles U. Jr. Macromolecules Containing Metal and Metal-Like Elements, Volume 1: A Half-Century of Metal- and Metalloid-Containing Polymers. Wiley & Sons, Incorporated, John, 2004.

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Paula, Cássio Remus de. Videogames, Ficção Científica e Distopias: Uma História Virtual Sobre Half-Life e Metal Gear Solid. Independently Published, 2018.

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Haynes, Lisa. Sheet Metal Worker Engineers Need Heroes Welding Welder 114 Pages 6''x9'' in Half Graph Line. Independently Published, 2022.

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Book chapters on the topic "Half-metal"

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Mandal, Tapas Kumar, and Martha Greenblatt. "Transition Metal Oxides: Magnetoresistance and Half-Metallicity." In Functional Oxides, 257–93. Chichester, UK: John Wiley & Sons, Ltd, 2010. http://dx.doi.org/10.1002/9780470686072.ch5.

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Ishizuka, Hiroaki. "Dirac Half-Metal on a Triangular Lattice." In Magnetism and Transport Phenomena in Spin-Charge Coupled Systems on Frustrated Lattices, 55–63. Tokyo: Springer Japan, 2015. http://dx.doi.org/10.1007/978-4-431-55663-3_4.

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Jeong, Hae-Kyung, Anthony Caruso, and Camelia N. Borca. "Surface Segregation and Compositional Instability at the Surface of Half-Metal Ferromagnets and Related Compounds." In Half-metallic Alloys, 221–39. Berlin, Heidelberg: Springer Berlin Heidelberg, 2006. http://dx.doi.org/10.1007/11506256_7.

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Durgun, Engin, and Salim Ciraci. "Half-Metallic and Magnetic Silicon Nanowires Functionalized by Transition-Metal Atoms." In Nanostructured Materials for Magnetoelectronics, 149–69. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-34958-4_6.

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Schwarze, Benedikt, Marta Gozzi, and Evamarie Hey-Hawkins. "Half- and Mixed-Sandwich Transition Metal Dicarbollides andnido-Carboranes(-1) for Medicinal Applications." In Boron-Based Compounds, 60–108. Chichester, UK: John Wiley & Sons, Ltd, 2018. http://dx.doi.org/10.1002/9781119275602.ch1.4.

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Gani, Muzafar, Khurshed A. Shah, Shabir A. Parah, and Altaf A. Balki. "CrO2 Half Metal-Based Magnetic Tunnel Junction and Its Application for Digital Computing." In Lecture Notes in Electrical Engineering, 563–72. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-8297-4_45.

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Yang, Lin H., R. L. Zhang, Y. J. Zeng, and C. Y. Fong. "Design of Alkali-Metal-Based Half-Heusler Alloys Having Maximum Magnetic Moments from First Principles." In Low Power Semiconductor Devices and Processes for Emerging Applications in Communications, Computing, and Sensing, 69–77. Boca Raton : Taylor & Francis, a CRC title, part of the Taylor &: CRC Press, 2018. http://dx.doi.org/10.1201/9780429503634-3.

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Wang, Yajie, Lufeng Wang, Chuanjiang Dong, Li Li, Mengqi Tang, Weizhong Sun, and Yao Wu. "Evaluation of Uncertainty for Determination of Trace Uranium in Biology by Laser Fluorescence Method." In Springer Proceedings in Physics, 549–66. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-1023-6_48.

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AbstractLarge amounts of uranium-containing radioactive waste are generated in reactor operation and in the research and manufacture of nuclear fuel elements. At present, there are various uranium enrichment and separation methods such as reduction precipitation method, ion exchange method, solvent extraction method, membrane filtration method, adsorption method, and microorganism method to treat the uranium-containing radioactive waste generated in the related processes of nuclear facilities. However, the airborne effluent or liquid effluent discharged after treatment may still contain radioactive uranium. It is well known that uranium is a radioactive heavy metal element, and its radioactive and chemical toxicity cannot be ignored. Uranium in the environment enters the human body through the food route, and its long half-life can make the human body suffer from continuous radioactive internal radiation damage. As an environmental medium, organisms are closely related to the entry of uranium into the human body through food. Therefore, it is of great significance to carry out accurate measurement of uranium content in environmental-grade biological samples around nuclear facilities, however, complete and accurate measurement results include measurement data and uncertainty. Laser fluorescence method is a method for rapid analysis of uranium content in environmental samples. It has the advantages of high sensitivity, simple sample pretreatment, and wide measurement range, which has been widely used in nuclear industry, environmental monitoring and scientific research. At present, there is a lack of relevant reports on the uncertainty of the measurement of total uranium content in environmental-grade biological samples by laser fluorescence method. It is of great significance to accurately measure the uranium content in biological samples by evaluating the uncertainty of this method. In this paper, the WGJ-III trace uranium analyzer was used to analyze the uncertainty source of total uranium in environmental-grade biological samples by laser fluorescence method. The uncertainty measurement model was established, the uncertainty components were quantified, and the expanded uncertainty of the measurement of total uranium content in environmental biological samples was calculated. The evaluation results showed that the expanded uncertainty of a 0.05 g environmental biological sample is 10.8% (k = 2) without dilution, and the dominant uncertainty component is derived from the measurement uncertainty of sample fluorescence counting.
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Wallace, Ingvar, David J. Funk, John G. Kaup, and W. H. Breckenridge. "The interactions of metal atoms with Xe, CH4 and H2: half-collision studies." In Gas Phase Metal Reactions, 393–433. Elsevier, 1992. http://dx.doi.org/10.1016/b978-0-444-89070-2.50022-0.

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Schmickler, Wolfgang. "Metal deposition and dissolution." In Interfacial Electrochemistry. Oxford University Press, 1996. http://dx.doi.org/10.1093/oso/9780195089325.003.0015.

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On a liquid metal electrode all surface sites are equivalent, and the deposition of a metal ion from the solution is conceptually simple: The ion loses a part of its solvation sheath, is transferred to the metal surface, and is discharged simultaneously; after a slight rearrangement of the surface atoms it is incorporated into the electrode. The details of the process are little understood, but it seems that the discharge step is generally rate determining, and the Butler-Volmer equation is obeyed if the concentration of the supporting electrolyte is sufficiently high. For example, the formation of lithium and sodium amalgams [1] in nonaqueous solvents according to: . . .Li + + e- ⇌ Li(Hg) Na+ = e- ⇌ Cd(Hg) . . . (10.1) obey the Butler-Volrner equation with transfer coefficients that depend on the solvent. On the other hand, the deposition of multivalent ions may involve several steps. Thus, the formation of zinc amalgam from aqueous solutions, with the overall reaction: . . . zn2+ + 2e- ⇌ Zn (Hg) . . . (10.2) occurs in two steps: First, Zn2+ is reduced to an intermediate Zn+ in an electron transfer step, and then the univalent ion is deposited [2]. In contrast, the surface of a solid metal offers various sites for metal deposition. Figure 10.1 shows a schematic diagram for a crystal surface with a quadratic lattice structure. A single atom sitting on a flat surface plane is denoted as an adatom; several such atoms can form an adatom cluster. A vacancy is formed by a single missing atom; several vacancies can be grouped to vacancy clusters. Steps are particularly important for crystal growth, with kink atoms, or atoms in the halfcrystal position, playing a special role. When a metal is deposited onto such a surface, the vacancies are soon filled. However, the addition of an atom in the kink position creates a new kink site; so at least on an infinite plane the number of kink sites does not change, and the current is maintained by incorporation into these sites. Similarly metal dissolution takes place predominantly at half-crystal positions, since the removal of a kink atom creates a new kink site.
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Conference papers on the topic "Half-metal"

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Mishra, S. R., K. Ghosh, J. Losby, T. Kehl, and A. Viano. "Half-metal-polymer magnetoresistive composite." In INTERMAG Asia 2005: Digest of the IEEE International Magnetics Conference. IEEE, 2005. http://dx.doi.org/10.1109/intmag.2005.1464156.

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Mishra, S. R., J. Losby, and K. Ghosh. "Transport Properties of Half-metal-Polymer Composite." In INTERMAG 2006 - IEEE International Magnetics Conference. IEEE, 2006. http://dx.doi.org/10.1109/intmag.2006.376107.

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Ramanathan, Amall Ahmed. "New Half Metal Perovskite NbScO3 for Spintronic Sensing Applications." In CSAC2021. Basel Switzerland: MDPI, 2021. http://dx.doi.org/10.3390/csac2021-10628.

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Fujiyama, Masaaki, Shigeo Komine, and Koshu Kurokawa. "High Performance Half-Inch Metal Tape for M-II Videocassettes." In SMPTE Television Conference. IEEE, 1987. http://dx.doi.org/10.5594/m00880.

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Butt, Muhammad Ali, Sergey Fomchenkov, and Hanh Hong Mai. "A plasmonic sensor configuration composed of nanodefects integrated metal-insulator-metal half-ring resonator air cavity." In 2020 International Conference on Information Technology and Nanotechnology (ITNT). IEEE, 2020. http://dx.doi.org/10.1109/itnt49337.2020.9253282.

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Pandey, Dhanshree, C. Kamal, and Aparna Chakrabarti. "Strain induced magnetism and half-metallicity in alkali metal substituted aluminene." In DAE SOLID STATE PHYSICS SYMPOSIUM 2018. AIP Publishing, 2019. http://dx.doi.org/10.1063/1.5113190.

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Yoshida, Nobukatsu, and Mikael Fogelström. "Spin-dependent Proximity Effects in d-wave Superconductor/Half-metal Heterostructures." In LOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24. AIP, 2006. http://dx.doi.org/10.1063/1.2354990.

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Poort, M. D., V. G. Daniele, and P. L. E. Uslenghi. "Scattering by three parallel Half-Planes perpendicularly truncated by a metal plane." In 2017 International Conference on Electromagnetics in Advanced Applications (ICEAA). IEEE, 2017. http://dx.doi.org/10.1109/iceaa.2017.8065248.

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Versluijs, Janko, J. F. De Marneffe, Danny Goossens, Maaike Op de Beeck, Tom Vandeweyer, Vincent Wiaux, Herbert Struyf, et al. "30nm half-pitch metal patterning using Moti CD shrink technique and double patterning." In SPIE Advanced Lithography. SPIE, 2008. http://dx.doi.org/10.1117/12.774139.

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Razevig, Vladimir, Sergey Ivashov, Nikolai Simonov, Andrey Zhuravlev, and Margarita Chizh. "Microwave Imaging in a Dielectric Half-Space Medium Bounded by a Metal Surface." In 2018 Progress in Electromagnetics Research Symposium (PIERS-Toyama). IEEE, 2018. http://dx.doi.org/10.23919/piers.2018.8597872.

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Reports on the topic "Half-metal"

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Scalettar, Richard T., and Warren E. Pickett. High-Pressure Thermodynamic Properties of f-electron Metals, Transition Metal Oxides, and Half-Metallic Magnets. Office of Scientific and Technical Information (OSTI), July 2004. http://dx.doi.org/10.2172/828525.

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Scalettar, Richard T., and Warren E. Pickett. High-Pressure Thermodynamic Properties of f-electron Metals, Transition Metal Oxides, and Half-Metallic Magnets. Office of Scientific and Technical Information (OSTI), August 2005. http://dx.doi.org/10.2172/843111.

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Sellgren, Katelyn, Christopher Gregory, Michael Hunt, Ashkay Raut, Brian Hawkins, Charles Parker, Ethan Klem, Jeffrey Piascik, and Brian Stoner. Development of an Electrochemical Process for Blackwater Disinfection in a Freestanding, Additive-Free Toilet. RTI Press, April 2017. http://dx.doi.org/10.3768/rtipress.2017.rr.0031.1704.

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Electrochemical disinfection has gained interest as an alternative to conventional wastewater treatment because of its high effectiveness and environmental compatibility. Two and a half billion people currently live without improved sanitation facilities. Our research efforts are focused on developing and implementing a freestanding, additive-free toilet system that treats and recycles blackwater on site. In this study, we sought to apply electrochemical disinfection to blackwater. We compared commercially available boron-doped diamond (BDD) and mixed metal oxide (MMO) electrodes for disinfection efficiency in E. coli–inoculated model wastewater. The MMO electrodes were found to be more efficient and thus selected for further study with blackwater. The energy required for disinfection by the MMO electrodes increased with the conductivity of the medium, decreased with increased temperature, and was independent of the applied voltage. Fecal contamination considerably increased the energy required for blackwater disinfection compared to model wastewater, demonstrating the need for testing in effluents representing the conditions of the final application.
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Demchyna, Bohdan, and Yaroslav Shydlovskyi. Recommendations for Designing Wooden Arches on Metal-toothed Plates. Intellectual Archive, March 2021. http://dx.doi.org/10.32370/ia_2021_03_18.

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This paper presents the findings of the pilot studies and recommendations for designing of two-hinged wooden arches. The prototype models of wooden arches with the span of 6mand the rise of 1m were designed. The models had a rectangular cross-section of 180x40mm and a T-section of 180x40mm with a plywood plate with the thickness of 6 mm and the width of 500mm. The main objective of the T-section was to ensure the stability of the arch. Each arch was composed of six segments –boards joined by clamping plates. The bowstring truss including two inclined tie bars enables carrying asymmetric loads and provides in-plane stability of the arch. A methodology for laboratory testing of the prototype models of wooden arches subjected to different types of loads was developed. Two prototypes of wooden arches were tested with rectangular cross-sections and two T-section ones subjected to the loading across the span, and two prototypes subjected to the half-span loading. In total, eight arches were tested. Deflections of arches, cross-section deformations and arch thrust force were recorded. The arches were tested until failure. The results of testing revealed insufficient stability of the arches with rectangular cross-section in the horizontal plane. For the arches with T-section the whole arch rib was damaged, the in-plane stability was ensured by the T-section. The collapsing force of the T-section arch was about 1.3 times greater than the collapsing force of the rectangular section arches.
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