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Title: Giant low frequency dielectric tunability in high-k Ba (Fe₁/₂Nb₁/₂)O₃ceramics at room temperature
Authors: Ke, Shanming
Huang, Haitao
Subjects: Ceramics
Dielectric materials
Domain boundaries
Grain size
Issue Date: 15-Sep-2010
Publisher: American Institute of Physics
Source: Journal of applied physics, 15 Sept. 2010, v. 108, no. 6, 064104, p. 1-6.
Abstract: The effect of electric field on the dielectric properties of high-k Ba (Fe₁/₂Nb₁/₂)O₃ceramics with different grain sizes is reported. A low frequency giant dielectric tunability (>85%) can be obtained under a bias field as low as 50 V/mm. The results suggest that the giant dielectric tunability originates from extrinsic contributions such as domain boundary and oxygen defect relaxations. These findings provide a clear understanding to the complicated dielectric response in a family of high-k ceramics and a key to the high tunability of nonferroelectrics under low electric fields, which is attractive for potential applications in tunable devices.
Rights: © 2010 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in S. Ke & H. Huang, J. Appl. Phys. 108, 064104 (2010) and may be found at
Type: Journal/Magazine Article
DOI: 10.1063/1.3487472
ISSN: 0021-8979 (print)
1089-7550 (online)
Appears in Collections:MRC Journal/Magazine Articles
AP Journal/Magazine Articles

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