Academic literature on the topic 'Intermediate-valence solids'

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Journal articles on the topic "Intermediate-valence solids"

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Lal, Ratan. "Theory of intermediate-valence solids." Physical Review B 34, no. 2 (1986): 1333–35. http://dx.doi.org/10.1103/physrevb.34.1333.

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Niehaus, Oliver, Paula M. Abdala, Rachid St Touzani, Boniface P. T. Fokwa, and Rainer Pöttgen. "Three structure types and intermediate cerium valence in the solid solution CeRu1–xNixSn." Solid State Sciences 40 (February 2015): 36–43. http://dx.doi.org/10.1016/j.solidstatesciences.2014.12.007.

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Niehaus, Oliver, Paula M. Abdala, Rachid St Touzani, Boniface P. T. Fokwa, and Rainer Poettgen. "ChemInform Abstract: Three Structure Types and Intermediate Cerium Valence in the Solid Solution CeRu1-xNixSn." ChemInform 46, no. 13 (2015): no. http://dx.doi.org/10.1002/chin.201513004.

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Niehaus, Oliver, Paula M. Abdala, and Rainer Pöttgen. "The solid solutions CeRu1–xPdxSn and CeRh1–xPdxSn – Applicability of the ICF model to determine intermediate cerium valencies by comparison with XANES data." Zeitschrift für Naturforschung B 70, no. 4 (2015): 253–64. http://dx.doi.org/10.1515/znb-2015-0003.

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AbstractSeveral samples of the solid solutions CeRu1–xPdxSn and CeRh1–xPdxSn have been synthesized by arc-melting and characterized by X-ray powder diffraction. Guinier powder patterns prove that the ZrNiAl-type structure is the dominating one, besides the CeRuSn and TiNiSi type structures. The structures of CeRu0.28Pd0.72Sn (ZrNiAl type, P6̅2m, a = 751.95(3), c = 418.70(2) pm, wR2 = 0.0274, 332 F2 values, 14 variables) and CeRh0.66Pd0.34Sn (ZrNiAl type, P6̅2m, a = 750.26(3), c = 411.59(2) pm, wR2 = 0.0533, 358 F2 values, 14 variables) were refined from single crystal diffractometer data. Magn
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Soboleva, E. G., A. L. Igisheva, and T. B. Krit. "Elastic Properties of Solid Solutions with Intermediate Valence Sm1-xYxS." Applied Mechanics and Materials 770 (June 2015): 137–43. http://dx.doi.org/10.4028/www.scientific.net/amm.770.137.

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The given article considers acoustic analogues of elasticity theory ratios determining Poisson’s ratios of Sm1-xYxS alloy by their elastic parameters. The article discusses behavior of sound velocities, elastic moduli, Poisson’s ratios, Grüneisen parameter and brittleness-plasticity criterion ratios depending on the concentration of alloy components including valence transition from semiconductors into the metal phase.
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von Rohr, Fabian, Michał J. Winiarski, Jing Tao, Tomasz Klimczuk, and Robert Joseph Cava. "Effect of electron count and chemical complexity in the Ta-Nb-Hf-Zr-Ti high-entropy alloy superconductor." Proceedings of the National Academy of Sciences 113, no. 46 (2016): E7144—E7150. http://dx.doi.org/10.1073/pnas.1615926113.

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High-entropy alloys are made from random mixtures of principal elements on simple lattices, stabilized by a high mixing entropy. The recently discovered body-centered cubic (BCC) Ta-Nb-Hf-Zr-Ti high-entropy alloy superconductor appears to display properties of both simple crystalline intermetallics and amorphous materials; e.g., it has a well-defined superconducting transition along with an exceptional robustness against disorder. Here we show that the valence electron count dependence of the superconducting transition temperature in the high-entropy alloy falls between those of analogous simp
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Sorescu, Monica, Tianhong Xu, and Collin Wade. "Role of Oxidation State of Vanadium in Vanadium Oxide-Hematite Nanoparticles." MRS Proceedings 1494 (2013): 185–90. http://dx.doi.org/10.1557/opl.2013.6.

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ABSTRACTSingle phase, a FeVO4 triclinic crystalline structure was successfully synthesized by annealing the mechanochemically milled xV2O5·(1-x)α-Fe2O3 composites (x = 0.5) at 550 °C for 1 h. X-ray powder diffraction (XRD) and Mössbauer spectroscopy were combined for a detailed study of the assisting role of the mechanochemical milling process. Mechanochemical milling homogeneously mixed the starting materials of α-Fe2O3 and V2O5 and substantially decreased their average grain sizes. The partially V5+-substituted α-Fe2O3 phase and Fe3+-substituted V2O5 could be the important intermediate phase
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Fogaça, Lara Alexandre, Laura Bereczki, Vladimir M. Petruševski, et al. "A Quasi-Intramolecular Solid-Phase Redox Reaction of Ammonia Ligands and Perchlorate Anion in Diamminesilver(I) Perchlorate." Inorganics 9, no. 5 (2021): 38. http://dx.doi.org/10.3390/inorganics9050038.

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The reaction of ammoniacal AgNO3 solution (or aq. solution of [Ag(NH3)2]NO3) with aq. NaClO4 resulted in [Ag(NH3)2]ClO4 (compound 1). Detailed spectroscopic (correlation analysis, IR, Raman, and UV) analyses were performed on [Ag(NH3)2]ClO4. The temperature and enthalpy of phase change for compound 1 were determined to be 225.7 K and 103.04 kJ/mol, respectively. We found the thermal decomposition of [Ag(NH3)2]ClO4 involves a solid-phase quasi-intramolecular redox reaction between the perchlorate anion and ammonia ligand, resulting in lower valence chlorine oxyacid (chlorite, chlorate) componen
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Zhao, Jie, Ling Long Kong, Chen Li, and Yong Chang Ma. "Investigation on Preparation and Electrical Properties of Novel Perovskite Cathode Materials Doped with Multi-Elements for IT-SOFC." Advanced Materials Research 532-533 (June 2012): 35–39. http://dx.doi.org/10.4028/www.scientific.net/amr.532-533.35.

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To develop novel cathode materials with high electrical performances for intermediate temperature solid oxide fuel cells (IT-SOFCs) and optimize the preparation process, perovskite-type oxides Pr1-x-ySrxCayCo1-zFezO3-δ (x=0.1, 0.2; y=0.1, 0.2; z=0.2, 0.3, 0.4; denoted as PSCCF-81182, PSCCF-72173 and PSCCF-62264) were prepared by solid state reaction. The formation process, phase structure and microstructure of the prepared samples were measured using TG-DTA, FT/IR, XRD and SEM techniques. The mixed conductivity of the samples was measured using DC four-terminal method in the range of 150-950 °
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Dudek, M. "Some Structural Aspects of Ionic Conductivity in Co-Doped Ceria-Based Electrolytes." Archives of Metallurgy and Materials 58, no. 4 (2013): 1355–59. http://dx.doi.org/10.2478/amm-2013-0174.

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Abstract The sinters of co-doped ceria solid solutions with the formula of Ce0.85Sm0.15-x RxO1.9, where R = Y, Gd, Pr, Tb, Ox-0.15, were obtained from powders synthesised by Pechini method. The linear variation of cell parameter a vs. chemical composition was observed for Ce0.85Sm0:15-xRxO1.9, where R = Y, Gd, Tb, 0 <x<0.15 samples. However, the introduction of Pr3+ into Ce0.85Sm0.15-x PrxO1.9 caused a small deviation from linearity due to possible changes in the valence from Pr3+ to Pr4+. The determined values of oxide transference number tion for Ce0.85Sm0.15-xRxO1.9, R = Y, Gd in the
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Dissertations / Theses on the topic "Intermediate-valence solids"

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Mora, P. de la. "A theoretical and experimental investigation of the intermediate valence phenomenon." Thesis, University of Oxford, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.371520.

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Taubitz, Christian. "Investigation of the magnetic and electronic structure of Fe in molecules and chalcogenide systems." Doctoral thesis, 2010. https://repositorium.ub.uni-osnabrueck.de/handle/urn:nbn:de:gbv:700-201006096312.

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In this work the electronic and magnetic structure of the crystals Sr2FeMoO6, Fe0.5Cu0.5Cr2S4, LuFe2O4 and the molecules FeStar, Mo72Fe30, W72Fe30 are investigated by means of X-ray spectroscopic techniques. These advanced materials exhibit very interesting properties like magnetoresistance or multiferroic behaviour. In case of the molecules they also could be used as spin model systems. A long standing issue concerning the investigation of these materials are contradicting results found for the magnetic and electronic state of the iron (Fe) ions present in these compounds. Therefore this work
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Book chapters on the topic "Intermediate-valence solids"

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Gunnarsson, O., and K. Schönhammer. "Intermediate Valence Spectroscopy." In Giant Resonances in Atoms, Molecules, and Solids. Springer US, 1987. http://dx.doi.org/10.1007/978-1-4899-2004-1_26.

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Hewson, A. C., D. M. Newns, J. W. Rasul, N. Read, H. U. Desgranges, and P. Strange. "Models for Intermediate Valence Systems and Kondo Lattices — Applications to Cerium and Ytterbium Compounds." In Springer Series in Solid-State Sciences. Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/978-3-642-82618-4_10.

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Conference papers on the topic "Intermediate-valence solids"

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Belomestnykh, V. N., and E. P. Tesleva. "Elastic properties of solid solutions with intermediate valence Sm1−xLaxS." In 2012 7th International Forum on Strategic Technology (IFOST). IEEE, 2012. http://dx.doi.org/10.1109/ifost.2012.6357768.

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