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Title: Crossover from a nearly constant loss to a superlinear power-law behavior in Mn-doped Bi(Mg₁/₂Ti₁/₂)O₃-PbTiO₃ferroelectrics
Authors: Ke, S
Huang, H 
Yu, S
Zhou, L 
Issue Date: 15-Apr-2010
Source: Journal of applied physics, 15 Apr. 2010, v. 107, no. 8, 084112, p. 1-4
Abstract: Mn-doped Bi(Mg₁/₂Ti₁/₂)–PbTiO₃disordered ferroelectric ceramics were studied under ac electric fields and a crossover from a nearly constant loss to a superlinear power-law behavior was observed. Our results confirmed that the nearly constant loss behavior also exists in disordered ferroelectrics. The exponent of the superlinear power-law was found to be temperature dependent. Such a behavior was related to the local movements of oxygen vacancies.
Keywords: Bismuth compounds
Ferroelectric ceramics
Lead compounds
Manganese
Permittivity
Vacancies (crystal)
Publisher: American Institute of Physics
Journal: Journal of applied physics 
ISSN: 0021-8979
EISSN: 1089-7550
DOI: 10.1063/1.3386511
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 et al., J. Appl. Phys. 107, 084112 (2010) and may be found at http://link.aip.org/link/?jap/107/084112
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