期刊
MATERIALS LETTERS
卷 111, 期 -, 页码 130-133出版社
ELSEVIER
DOI: 10.1016/j.matlet.2013.08.061
关键词
BiFeO3; Multiferroic; Nanoparticles; Sol-gel; Microwave absorption
资金
- National Natural Science Foundation of PR China [51372282, 50972014, 51072024, 21132002]
La substituted BiFeO3 nanoparticles were prepared by the sol-gel method. The effects of La on the structure, ferromagnetism and microwave absorpion properties of BiFeO3 at room temperature are investigated systematically. With 20 mol% La substitution, BiFeO3 undergoes a phase transformation from rhombohedral to pseudotetragonal structure, and its saturation magnetization enhances from 0.15 to 0.85 emu/g under the magnetic field of 20 kOe. The microwave absorption properties of BiFeO3 with La substitution is obviously enhanced in the frequency range from 8.2 to 12.4 GHz due to the improvement of electromagnetic match, and the maximum reflection loss reaches up to 30 dB, almost triple that of BiFeO3. (C) 2013 Elsevier B.V. All rights reserved.
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