期刊
SOLID STATE COMMUNICATIONS
卷 150, 期 31-32, 页码 1453-1456出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ssc.2010.05.029
关键词
La2NiMnO6 ceramics; Sintering; Tunability; Dielectric characteristics
资金
- National Natural Science Foundation of China (NSFC) [10732100, 60876054]
- Hunan Provincial Natural Science Foundation of China [08JJ3122]
- Natural Science Foundation of Hunan Province for Innovation Group [09JJ7004]
The effect of applied dc bias electric field on dielectric permittivity in bulk La2NiMnO6 is investigated in this paper. It is found that a small bias field of 40 V/cm can greatly reduce the dielectric permittivity around the room temperature, compared to the much larger electric field that is required for conventional ferroelectric materials. The observed giant dielectric tunability is retained over a broad range of around room temperature and is most likely related to the charge ordering of Ni2+ and Mr(4+) ions, further confirming the existence of electronic ferroelectricity in La2NiMnO6. (C) 2010 Elsevier Ltd. All rights reserved.
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