Intrinsic piezoelectric response in perovskite alloys: PMN-PT versus PZT

被引：173
|
作者：
Bellaiche, L [1 ]
Vanderbilt, D
机构：
[1] Univ Arkansas, Dept Phys, Fayetteville, AR 72701 USA
[2] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08855 USA
来源：
PHYSICAL REVIEW LETTERS | 1999年 / 83卷 / 07期
关键词：
D O I：
10.1103/PhysRevLett.83.1347
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
First-principles supercell calculations and the modem theory of polarization are used to compute the e(33) piezoelectric coefficients of Pb(Zr0.5Ti0.5O3) (PZT) and 0.60 Pb(Mg1/3Nb2/3)O-3 + 0.40 PbTiO3 (PMN-PT) alloys. A drastic enhancement by a factor of 2.7 is found for e(33) when going from PZT to PMN-PT. The huge value of e(33) in PMN-PT comes from the large response of the internal coordinates of Pb, Ti, Nb, and O atoms to a macroscopic strain. On the other hand, the Mg atoms contribute little to the piezoelectricity for dielectric and elastic reasons.
引用
收藏
页码：1347 / 1350
页数：4
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