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Microscopic Region Effect on the Dielectric Property of the Diffused Phase Transition Ferroelectrics: A Reasonable and Effective Diffuseness Characterizing Parameter
Author(s) -
Mao Chaoliang,
Dong Xianlin,
Wang Genshui,
Cao Sheng,
Yao Chunhua,
Uchino Kenji
Publication year - 2010
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2010.04224.x
Subject(s) - ferroelectricity , condensed matter physics , phase transition , dielectric , degree (music) , materials science , phase (matter) , phenomenological model , microscopic theory , statistical physics , physics , quantum mechanics , optoelectronics , acoustics
Based on the microscopic composition fluctuation model and phenomenological theory, a reasonable and effective characterizing parameter of the diffuseness degree of the diffused phase transition (DPT) was defined. The parameter equals to the temperature interval of and which correspond to the temperatures when reaches the minimum and maximum, respectively. The parameter reflects the diffuseness degree macroscopically and can be easily calculated. This characterizing parameter has been proved to be useful for ferroelectric materials including normal ferroelectrics, common DPT ferroelectrics, and typical relaxor ferroelectrics.