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Effect of Preparation Conditions on Magnetic and Dielectric Properties of Y 2 MMnO 6 (M = Co, Ni)
Author(s) -
Katari Vasundhara,
Babu Peram Delli,
Mishra Sanjaya K.,
Mittal Ranjan,
Bevara Samatha,
Achary Srungarpu N.,
Deshpande Sudhansu K.,
Tyagi Avesh K.
Publication year - 2016
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.13975
Subject(s) - dielectric , ferromagnetism , annealing (glass) , antiferromagnetism , materials science , paramagnetism , condensed matter physics , magnetic field , analytical chemistry (journal) , permittivity , metamagnetism , inert gas , nuclear magnetic resonance , magnetization , chemistry , metallurgy , physics , composite material , optoelectronics , chromatography , quantum mechanics
Herein we report the structure, magnetic and dielectric properties of Y 2 CoMnO 6 ( YCMO ) and Y 2 NiMnO 6 ( YNMO ) prepared under various conditions. On annealing in inert atmosphere, YCMO sample shows a partial decomposition while YNMO remains unaffected. Both YCMO and YNMO samples show paramagnetic to ferromagnetic transition around 80 K, but only the magnetic properties of YCMO samples depend on the preparation conditions. YCMO samples show antiferromagnetic ground state in zero field and a metamagnetic transition at relatively low field (~2 T). Differences in the annealing environment do not destroy the initial antiparallel spin order in YCMO , but affect the critical fields of metamagnetic transition. The field‐dependent magnetic properties indicated soft ferromagnetic nature of YNMO samples. The dielectric measurements show distinct frequency and temperature‐dependent features in YCMO samples compared to YNMO samples. A large relative permittivity with ε׳ of about 10 4 is observed in both O 2 and air‐annealed YCMO samples. Multiple dielectric relaxations are observed in all the annealed YCMO and YNMO samples.