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Enhancement in electrical and magnetodielectric properties of Ca- and Ba-doped BiFeO3 polycrystalline ceramics
R. Balakrishnan, , R. Naik, M.S.R. Rao
Published in Blackwell Publishing Inc.
2018
Volume: 101
   
Issue: 2
Pages: 782 - 788
Abstract
We carried out a comparative study on the electrical and magnetodielectric properties of polycrystalline BiFeO3, Bi0.9Ca0.1FeO2.95, Bi0.9Ba0.05Ca0.05FeO2.95, and Bi0.9Ba0.1FeO2.95 ceramics. The two dielectric anomalies, near 25 K and 281 K, are observed for BiFeO3. Interestingly, the anomaly near 25 K shifts towards a higher temperature above 60 K with Ca and/or Ba doping, attributed to the doping induced chemical pressure. In addition, the room temperature switchable magnetodielectric effect is witnessed for the doped BiFeO3 compounds, due to the quadratic magnetoelectric coupling. This indicates the improved magnetoelectric coupling in BiFeO3 with the Ca and Ba doping. This is essentially due to the enhanced magnetic ordering and reduced leakage current in BiFeO3 after the doping. © 2017 The American Ceramic Society
About the journal
JournalJournal of the American Ceramic Society
PublisherBlackwell Publishing Inc.
ISSN00027820
Open AccessNo