Relevant bibliographies by topics / Magneto-dielectric composites

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  1. Journal articles
  2. Dissertations / Theses
  3. Conference papers

Academic literature on the topic 'Magneto-dielectric composites'

Author: Grafiati
Published: 4 June 2021
Last updated: 8 February 2022

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Journal articles on the topic "Magneto-dielectric composites"

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Galizia, Pietro, Maksimas Anbinderis, Robertas Grigalaitis, Juras Banys, Carlo Baldisserri, Giovanni Maizza, and Carmen Galassi. "Magneto-dielectric characterization of TiO2-CoFe2O4 derived ceramic composites." Processing and Application of Ceramics 12, no. 4 (2018): 350–56. http://dx.doi.org/10.2298/pac1804350g.

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Dielectric permittivity (??), magnetic permeability (??) and dielectric and magnetic loss (tan ?? and tan ??, respectively) of magneto-dielectric cobalt ferrite-titania (CFO-TO) ceramic composites are determined from 200 to 300MHz. The four different combinations of phases - that can be produced in the sintered composite, according to the starting CFO/TO molar ratio - allow to tune the macroscopic permittivity and permeability. For the first time impedance, miniaturization and magneto-dielectric loss of the four classes of composites are calculated and discussed. The displayed miniaturization factors between 4.4 and 8.2 in the very-high frequency (VHF) range corroborate their potential application as magneto-dielectric substrate materials for antennas. Remarkably, the ceramic composites characterized by 2 vol.% and 3 vol.% of CFO and TO, respectively, dispersed in Fe2CoTi3O10 (FCTO) matrix display a magneto-dielectric loss lower than 0.07 and a miniaturization factor of 4.8.
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Bhoi, Krishnamayee, Smaranika Dash, Sita Dugu, Dhiren K. Pradhan, Anil K. Singh, Prakash N. Vishwakarma, Ram S. Katiyar, and Dillip K. Pradhan. "Investigation of the Phase Transitions and Magneto-Electric Response in the 0.9(PbFe0.5Nb0.5)O3-0.1Co0.6Zn0.4Fe1.7Mn0.3O4 Particulate Composite." Journal of Composites Science 5, no. 7 (June 24, 2021): 165. http://dx.doi.org/10.3390/jcs5070165.

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Multiferroic composites with enhanced magneto-electric coefficient are suitable candidates for various multifunctional devices. Here, we chose a particulate composite, which is the combination of multiferroic (PbFe0.5Nb0.5O3, PFN) as matrix and magnetostrictive (Co0.6Zn0.4Fe1.7Mn0.3O4, CZFMO) material as the dispersive phase. The X-ray diffraction analysis confirmed the formation of the composite having both perovskite PFN and magnetostrictive CZFMO phases. The scanning electron micrograph (SEM) showed dispersion of the CZFMO phase in the matrix of the PFN phase. The temperature-dependent magnetization curves suggested the transition arising due to PFN and CZFMO phase. The temperature-dependent dielectric study revealed a second-order ferroelectric to the paraelectric phase transition of the PFN phase in the composite with a small change in the transition temperature as compared to pure PFN. The magnetocapacitance (MC%) and magnetoimpedance (MI%) values (obtained from the magneto-dielectric study at room temperature (RT)) at 10 kHz were found to be 0.18% and 0.17% respectively. The intrinsic magneto-electric coupling value for this composite was calculated to be 0.14 mVcm−1Oe−1, which is comparable to other typical multiferroic composites in bulk form. The composite PFN-CZFMO exhibited a converse magneto-electric effect with a change in remanent magnetization value of −58.34% after electrical poling of the material. The obtained outcomes from the present study may be utilized in the understanding and development of new technologies of this composite for spintronics applications.
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Cheng, Zhi Hong, Feng Zhang, An Ping Huang, and Zhi Song Xiao. "Magneto-Dielectric Properties of Fe3O4/TiO2/PTFE Composites and Antenna Simulation." Materials Science Forum 787 (April 2014): 352–56. http://dx.doi.org/10.4028/www.scientific.net/msf.787.352.

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In this paper, a novel composite of magneto-dielectric mixture Fe3O4/TiO2 filled polymer PTFE was synthesized for a compact antenna application. Magnetic permeability, dielectric permittivity and related loss were measured and optimized. A planar patch antenna performance based on these composites with a center frequency at 1 GHz was simulated. The simulated antenna performances such as impedance bandwidth and radiation efficiency indicated that the antenna fabricated by this proposed composite could exhibit a better electrical property than that of conventional antenna printed on dielectric material.
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Devidas, G. B., Sunar Abdul Khader, Asiya Parveez, Nityananda Das, and T. Sankarappa. "Dielectric Studies of Ferrimagnetic-Piezoelectric Composites." Materials Science Forum 1019 (January 2021): 129–34. http://dx.doi.org/10.4028/www.scientific.net/msf.1019.129.

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Magneto-electric composites of two distinct phases, ferrimagnetic-piezoelectric system with general compositional formula (x) ferromagnetic + (1-x) piezoelectric were synthesized using a hybrid technique, mechano-chemical method by sintering the mixtures of piezo-electric BaTiO3 (BTO) and ferri-magnetic Mg0.2Cu0.5Zn0.3Fe2O4 (MCZF). Here, ferri-magnetic phase component MCZF (Mg0.2Cu0.5Zn0.3Fe2O4) was prepared using auto-combustion method, whereas piezo-electric BTO was procured commercially from Sigma-Aldrich. Here, the general composition of composites is given by (x) Mg0.2Cu0.5Zn0.3Fe2O4+(1-x) BaTiO3(x=15%, 30% and 45%). Presences of two phases in these magneto-electric composites were probed using X-ray diffraction (XRD) studies. Peaks observed in the XRD spectrum indicated spinel cubic structure for MCZF ferrite and tetragonal perovskite structure for BTO and, both spinel and pervoskite structures for synthesized composites. Micro-structure of the samples has been investigated using Field Emission Scanning Electron Microscope (FESEM). Frequency dependent dielectric properties of synthesized composites were measured from 100 Hz to 1 MHz at room temperature using a precision HIOKI make LCR HI-TESTER. Dielectric dispersion was observed at lower frequencies for the synthesized composites.
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Vural, M., O. Gerber, B. P. Pichon, S. Lemonnier, E. Barraud, L. C. Kempel, S. Begin-Colin, and P. Kofinas. "Stretchable magneto-dielectric composites based on raspberry-shaped iron oxide nanostructures." Journal of Materials Chemistry C 4, no. 12 (2016): 2345–52. http://dx.doi.org/10.1039/c6tc00419a.

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Vural, Mert, Benjamin Crowgey, Leo C. Kempel, and Peter Kofinas. "Nanostructured flexible magneto-dielectrics for radio frequency applications." J. Mater. Chem. C 2, no. 4 (2014): 756–63. http://dx.doi.org/10.1039/c3tc32113d.

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Chand Verma, Kuldeep, S. K. Tripathi, and R. K. Kotnala. "Magneto-electric/dielectric and fluorescence effects in multiferroic xBaTiO3–(1 − x)ZnFe2O4 nanostructures." RSC Adv. 4, no. 104 (2014): 60234–42. http://dx.doi.org/10.1039/c4ra09625h.

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Rather, Gowher Hameed, Mehraj ud Din Rather, Nazima Nazir, Afreen Ikram, Mohd Ikram, and Basharat Want. "Particulate multiferroic Ba0.99Tb0.02Ti0.99O3 – CoFe1.8Mn0.2O4 composites: Improved dielectric, ferroelectric and magneto-dielectric properties." Journal of Alloys and Compounds 887 (December 2021): 161446. http://dx.doi.org/10.1016/j.jallcom.2021.161446.

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Khader, S. Abdul, T. Sankarappa, T. Sujatha, J. S. Ashwajeet, and R. Ramanna. "Structural and Dielectric Studies on Magneto Electric Nano-composites." Materials Today: Proceedings 2, no. 9 (2015): 4334–43. http://dx.doi.org/10.1016/j.matpr.2015.10.022.

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Lin, Ying, Xiao Liu, Haibo Yang, Fen Wang, and Chun Liu. "Electromagnetic properties of laminated Ni0.5Ti0.5NbO4-Bi0.4Y2.6Fe5O12 magneto-dielectric composites." Journal of the European Ceramic Society 36, no. 14 (November 2016): 3363–68. http://dx.doi.org/10.1016/j.jeurceramsoc.2016.05.029.

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Dissertations / Theses on the topic "Magneto-dielectric composites"

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Rocha, HÃlio Henrique Barbosa. "Estudo das propriedades estruturais e de transporte dos compÃsitos magneto-dielÃtricos [(Fe5/8Cr3/8)2O3]x-[(Fe1/4Cu3/8Ti3/8)2O3]100âx." Universidade Federal do CearÃ, 2006. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=7065.

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O processamento em escala laboratorial de soluÃÃes sÃlidas, procedentes dos sistemas Fe2O3/CuO/TiO2 e Fe2O3/Cr2O3, dos seus compÃsitos, e o estudo das propriedades estruturais e de transporte estabelecem o tema principal do trabalho. As granadas ferrimagnÃticas despertam manifesto interesse quanto ao seu emprego em dispositivos aplicÃveis a sistemas de telecomunicaÃÃo operantes nas microondas, sobretudo, em funÃÃo das propriedades dielÃtricas e magnÃticas adequadas. Devido à semelhanÃa estequiomÃtrica, e com a finalidade de se obter materiais com propriedades similares, foram elaborados dois meios magneto-dielÃtricos: (Fe1/4Cu3/8Ti3/8)2O3, um titanato de cobre e ferro, e (Fe5/8Cr3/8)2O3, um Ãxido especÃfico de ferro e cromo. Estas soluÃÃes sÃlidas substitucionais foram sintetizadas por reaÃÃo de estado sÃlido. O processamento avanÃou envolvendo tratamentos mecÃnico e tÃrmico. Foram preparados espÃcimes pulverulentos e com configuraÃÃo definida. A estrutura cristalina dos espÃcimes foi identificada por difraÃÃo de raios-X. Os dados de difraÃÃo de raios-X por policristais foram refinados pelo emprego do mÃtodo de Rietveld. Fez-se uso da espectroscopia MÃssbauer para realizar a sondagem do ferro presente na estrutura cristalina. A morfologia dos espÃcimes, dispostos como peÃas cilÃndricas rÃgidas, foi explorada por Microscopia EletrÃnica de Varredura, assistida por microssonda EDX, para anÃlise quÃmica elementar. Por espectroscopia dielÃtrica foram investigadas as propriedades dielÃtricas permissividade dielÃtrica relativa e fator de perda dielÃtrico e a propriedade de transporte condutividade elÃtrica. As propriedades dielÃtricas e de transporte foram analisadas em funÃÃo da freqÃÃncia, a temperatura ambiente, numa faixa compreendida entre 100 Hz e 40 MHz. Dos dados por difraÃÃo de raios-X, alÃm da identificaÃÃo dos materiais avaliados, foram extraÃdas, apÃs refinamento estrutural, informaÃÃes cristalogrÃficas, no caso das soluÃÃes sÃlidas individuais, e sua quantificaÃÃo, no caso dos compÃsitos por elas constituÃdos. Pela espectroscopia MÃssbauer foram confirmados o estado de oxidaÃÃo do ferro presente nos materiais analisados, a geometria do sÃtio cristalino no qual està presente, a natureza magnÃtica das amostras, e seu provÃvel ordenamento, alÃm da quantificaÃÃo realizada em funÃÃo da quantidade de ferro presente nos compÃsitos. A morfologia dos materiais Ã, em geral, caracterizada pela diversidade de formas e tamanhos dos grÃos, bem como sua disposiÃÃo no artefato explorado. A anÃlise quÃmica elementar forneceu resultados quantitativos acerca dos elementos presentes nos meios investigados. Pela resposta observada na faixa de freqÃÃncia percorrida, ficou evidenciada uma regiÃo de dispersÃo, caracterÃstica do processo de polarizaÃÃo dipolar. Os resultados das propriedades dielÃtricas para as fases sintetizadas mostraram-se parcialmente antagÃnicos: a fase IB100 apresentou a maior permissividade dielÃtrica relativa, porÃm, maior fator de perda dielÃtrica em relaÃÃo à fase IC100, que por sua vez apresentou a menor permissividade dielÃtrica relativa entre todos os materiais investigados. Para os compÃsitos, formados pela mistura aleatÃria de quantidades especÃficas das duas fases sintetizadas, foi evidenciado um comportamento nÃo linear, de forma que estes nÃo representam apenas o reflexo das respostas observadas para as fases individualmente. A fase IB100, em virtude da constante dielÃtrica observada, à o material com maior potencial para aplicaÃÃes em altas freqÃÃncias.
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Conference papers on the topic "Magneto-dielectric composites"

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Arya, Ekta, Ashish Agarwal, Rakesh Dhar, Anand Kumari, and Vibha Meenal. "Structural, dielectric and magnetic properties of BaFe12O19-Na0.5Bi0.5TiO3 magneto-electric composites." In DAE SOLID STATE PHYSICS SYMPOSIUM 2018. AIP Publishing, 2019. http://dx.doi.org/10.1063/1.5113320.

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Bayraktar, Z., M. Gregory, D. Kern, and D. H. Werner. "Matched impedance thin composite magneto-dielectric metasurfaces." In amp; USNC/URSI National Radio Science Meeting. IEEE, 2009. http://dx.doi.org/10.1109/aps.2009.5172273.

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Bayraktar, Zikri, Xiande Wang, and Douglas H. Werner. "Thin composite matched impedance magneto-dielectric metamaterial absorbers." In 2010 IEEE International Symposium Antennas and Propagation and CNC-USNC/URSI Radio Science Meeting. IEEE, 2010. http://dx.doi.org/10.1109/aps.2010.5561772.

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Bhoi, Krishnamayee, Md F. Abdullah, A. K. Singh, P. N. Vishwakarma, and Dillip K. Pradhan. "Room temperature magneto-dielectric properties of PFN-CZFMO composite." In DAE SOLID STATE PHYSICS SYMPOSIUM 2019. AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0017473.

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Fechine, P. B. A., G. Fontgalland, and A. S. B. Sombra. "New materials for miniaturized magneto-dielectric antennas based on GdIGxYIG1-x composite." In 2016 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting. IEEE, 2016. http://dx.doi.org/10.1109/aps.2016.7696676.

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Jain, Prince, Shonak Bansal, Naveen Kumar, Sanjeev Kumar, Neena Gupta, and Arun K. Singh. "Magneto-dielectric properties of composite ferrite based substrate for UHF band microstrip antenna." In 2017 Progress In Electromagnetics Research Symposium - Spring (PIERS). IEEE, 2017. http://dx.doi.org/10.1109/piers.2017.8261886.

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Borah, S., and N. S. Bhattacharyya. "GCPWG technique for measurement of dielectric properties of magneto-polymer composite at microwave frequencies." In 2009 Applied Electromagnetics Conference (AEMC 2009). IEEE, 2009. http://dx.doi.org/10.1109/aemc.2009.5430594.

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