Soft phonon anomalies in the relaxer ferroelectric Pb(Zn1/3Nb2/3)0.92Ti0.08O3

被引：143

作者：

Gehring, PM ^{[1
]}

Park, SE

Shirane, G

机构：

[1] Natl Inst Stand & Technol, Ctr Neutron Res, Gaithersburg, MD 20899 USA

[2] Penn State Univ, Mat Res Lab, University Pk, PA 16802 USA

[3] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 84卷 / 22期

关键词：

D O I：

10.1103/PhysRevLett.84.5216

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Neutron inelastic scattering measurements of the polar transverse optic phonon mode dispersion in the cubic relaxor Pb(Zn1/3Nb2/3)(0.92)Ti0.08O3 at 500 K reveal anomalous behavior in which the optic branch appears to drop precipitously into the acoustic branch at a finite value of the momentum transfer q = 0.2 Angstrom(-1) measured from the zone center. We speculate that this behavior is the result of nanometer-sized polar regions in the crystal.

引用

页码：5216 / 5219

页数：4

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