Journal
SOLID STATE COMMUNICATIONS
Volume 150, Issue 29-30, Pages 1334-1337Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ssc.2010.05.005
Keywords
Multiferroics; Dielectric; Leakage; Magnetodielectric effect
Categories
Funding
- NPU Foundation for Fundamental Research [NPU-FFR-JC200821]
- National Natural Science Foundation of China [50331040]
- Northwestern Polytechnical University [Z200968]
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(1 - x) BiFeO3-xLa(1/3)Sr(2/3)MnO(3) hybrid composite ceramics (x = 0, 0.1, 0.2, 0.3) are prepared by a solid state sintering method. X-ray diffraction shows that the hybrid composite ceramics mainly consist of BiFeO3 and La1/3Sr2/3MnO3 and no middle phase products. The study of the M-H curve reveals that BiFeO3 is antiferromagnetic with residual magnetism (0.068 emu/g) due to canting of the spin. By introducing La1/3Sr2/3MnO3, weak antiferromagnetism is obviously improved. For composites with x = 0.1, the largest magnetization is observed. On the other hand, with increasing La2/3Sr1/3MnO3, magnetization declines. Additionally, as the content of La2/3Sr1/3MnO3 increase, the dielectric constant is found to be increased, while dielectric loss is found to be reduced. By applying a static magnetic field, a large magnetodielectric (MD) effect is obtained. The largest MD effect is obtained at x = 0.3. The observed large MD effect can be explained in terms of magnetic field induced polarization. (C) 2010 Elsevier Ltd. All rights reserved.
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