Outlining origin of diffuse plus relaxor ferro-to paraelectric phase transition in lead metaniobate-based materials

被引：0

作者：

Venet, M. ^{[1
]}

Zabotto, F. L. ^{[1
]}

Eiras, J. A. ^{[1
]}

Garcia, D. ^{[1
]}

Garcia, J. E. ^{[2
]}

Ochoa, D. A. ^{[2
]}

M'Peko, J-C. ^{[3
]}

机构：

[1] Univ Fed Sao Carlos UFSCar, Dept Fis, Sao Carlos, SP, Brazil

[2] Univ Politec Catalunya, Dept Fis Aplicada, Barcelona, Spain

[3] Univ Sao Paulo, Inst Fis Sao Carlos, Grupo Crescimento Cristais Mat Ceramicos, Sao Carlos, SP, Brazil

来源：

2012 INTERNATIONAL SYMPOSIUM ON APPLICATIONS OF FERROELECTRICS HELD JOINTLY WITH 11TH IEEE ECAPD AND IEEE PFM (ISAF/ECAPD/PFM) | 2012年

关键词：

ferroelectrics; dielectric response; relaxors; phase transitions; BARIUM NIOBATE; MAGNESIUM NIOBATE; FERROELECTRICS; CERAMICS; ORDER;

D O I：

暂无

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Lead metaniobate-based ferroelectrics were studied in terms of thermal spectra of dielectric permittivity, Curie-Weiss law and hysteresis loop characteristics. This work shows that while dopants are able to promote a change of the ferro-to paraelectric phase transition appearance from normal to diffuse, transformation to a diffuse plus relaxor transition behavior is linked to incommensurate superstructures present and dielectrically-active, with an intrinsically frequency-dispersive response, in these materials toward low temperatures. This statement is also supported by observation of hysteresis loops showing a transformation trend to pseudo-slim-like, even in the normal ferroelectrics, when moving into the temperature region of incommensuration manifestation.

引用

页数：4

共 23 条

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