期刊
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
卷 105, 期 3, 页码 679-683出版社
SPRINGER
DOI: 10.1007/s00339-011-6608-5
关键词
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资金
- National Natural Science Foundation of China (NSFC) [10732100, 60876054, 51072171]
- Natural Science Foundation of Hunan Province for Innovation Group [09JJ7004]
- Department of Hunan Province [2010FJ3029]
- Doctoral Program of Higher Education of China [20104301110001]
- Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry
The effect of applied dc bias electric field on dielectric permittivity in bulk Y2NiMnO6 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 Mn4+ ions. This may further confirm the existence of electronic ferroelectricity in Y2NiMnO6.
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