Effects of Mn doping on multiferroic and magnetocapacitive properties of 0.33Ba0.70Ca0.30TiO3-0.67BiFeO3 diphasic ceramics

Cai Xia Li, Bin Yang, Shan Tao Zhang, Dan Qing Liu, Rui Zhang, Ye Sun, Wen Wu Cao

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28 Scopus citations

Abstract

The 0.33Ba0.70Ca0.30TiO3-0.67BiFeO 3 + x wt% MnO2 (BCT-67BF:Mn100x, x = 0-0.6) multiferroic ceramics have been prepared. The effects of Mn doping on structures, electric, magnetic as well as magnetocapacitive properties have been intensively investigated. It is found that all the ceramics have diphasic tetragonal-rhombohedral phases, whereas Mn doping improves the densification and significantly decreases the grain size. As x increases, the relaxor degree increases, the ferroelectricity and piezoelectricity weaken monotonically, while the magnetism enhances firstly, reaching the maximum near x = 0.5, and then decreases. Interestingly, the room temperature relative dielectric constant shows an obvious increase with increasing applied magnetic fields (H), the magnetocapacitive coefficient (εr(H)-εr(0))/ εr(0) decreases with increasing Mn content, from 2.96% for x = 0 - 0.86% for x = 0.6.

Original languageEnglish (US)
Pages (from-to)346-354
Number of pages9
JournalJournal of Alloys and Compounds
Volume590
DOIs
StatePublished - Mar 25 2014

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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