Composition modulation away from the polar direction in Pb(Sc,Nb)O3 alloys -: art. no. 060102

被引：9

作者：

George, AM ^{[1
]}

Bellaiche, L ^{[1
]}

机构：

[1] Univ Arkansas, Dept Phys, Fayetteville, AR 72701 USA

来源：

PHYSICAL REVIEW B | 2001年 / 64卷 / 06期

关键词：

D O I：

10.1103/PhysRevB.64.060102

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A first-principles-derived approach is used to study properties of Pb(Sc,Nb)O-3 alloys that are compositionally modulated along the [001] pseudocubic direction. The direction of the local electrical polarizations is found to be spatially-dependent, and can be adjusted with the modulation parameters. Furthermore, modulated structures with large composition gradients adopt a monoclinic phase-in which the total electrical polarization lies between the [111] and [110] directions-for their ferroelectric ground state, and exhibit large electromechanical responses.

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页码：601021 / 601024

页数：4

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