Cold neutron study on the diffuse scattering and phonon excitations in the relaxor Pb(Mg1/3Nb2/3)O3 -: art. no. 184105

被引：69

作者：

Hiraka, H ^{[1
]}

Lee, SH

Gehring, PM

Xu, GY

Shirane, G

机构：

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

[2] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan

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

来源：

PHYSICAL REVIEW B | 2004年 / 70卷 / 18期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevB.70.184105

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Cold neutron scattering experiments have been performed to explore the energy, temperature, and wave-vector dependence of the diffuse scattering and the transverse acoustic (TA) phonons in the relaxor Pb(Mg1/3Nb2/3)O-3. We have observed a weak diffuse scattering cross section above the Burns temperature T(d)similar to600 K. This cross section, which is most likely caused by chemical short-range order, persists down to 100 K, and coexists with the much stronger diffuse scattering that is attributed to the polar nanoregions. A systematic study of the TA phonon around (1, 1, 0) has also been carried out. The phonon is well defined for small wave-vectors q, but broadens markedly around q=(0.1,-0.1,0).

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页数：7

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