Soft Mode Dynamics above and below the Burns Temperature in the Relaxor Pb(Mg1/3Nb2/3)O3

P. M. Gehring; S. Wakimoto; Z. G. Ye; G. Shirane

doi:10.1103/PhysRevLett.87.277601

Soft Mode Dynamics above and below the Burns Temperature in the Relaxor Pb(Mg_1/3Nb_2/3)O₃

P. M. Gehring
, S. Wakimoto
, Z. G. Ye
, G. Shirane

National Institute of Standards and Technology
University of Toronto
Brookhaven National Laboratory
Simon Fraser University

科研成果: 期刊稿件 › 文章 › 同行评审

4 引用（Scopus）

摘要

We report neutron inelastic scattering measurements of the lowest-energy transverse optic (TO) phonon branch in the relaxor Pb(Mg_1/3Nb_2/3)O₃from 400 to 1100 K. Far above the Burns temperature T_d∼630K we observe well-defined propagating TO modes at all wave vectors q, and a zone center TO mode that softens in a manner consistent with that of a ferroelectric soft mode. Below T_dthe zone center TO mode is overdamped. This damping extends up to, but not above, the waterfall wave vector q_wf, which is a measure of the average size of the polar nanoregions.

源语言	英语
页（从-至）	277601-277601-4
期刊	Physical Review Letters
卷	87
期	27
DOI	https://doi.org/10.1103/PhysRevLett.87.277601
出版状态	已出版 - 31 12月 2001
已对外发布	是

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abstract = "We report neutron inelastic scattering measurements of the lowest-energy transverse optic (TO) phonon branch in the relaxor Pb(Mg1/3Nb2/3)O3from 400 to 1100 K. Far above the Burns temperature Td∼630K we observe well-defined propagating TO modes at all wave vectors q, and a zone center TO mode that softens in a manner consistent with that of a ferroelectric soft mode. Below Tdthe zone center TO mode is overdamped. This damping extends up to, but not above, the waterfall wave vector qwf, which is a measure of the average size of the polar nanoregions.",

author = "Gehring, \{P. M.\} and S. Wakimoto and Ye, \{Z. G.\} and G. Shirane",

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T1 - Soft Mode Dynamics above and below the Burns Temperature in the Relaxor Pb(Mg1/3Nb2/3)O3

AU - Gehring, P. M.

AU - Wakimoto, S.

AU - Ye, Z. G.

AU - Shirane, G.

PY - 2001/12/31

Y1 - 2001/12/31

N2 - We report neutron inelastic scattering measurements of the lowest-energy transverse optic (TO) phonon branch in the relaxor Pb(Mg1/3Nb2/3)O3from 400 to 1100 K. Far above the Burns temperature Td∼630K we observe well-defined propagating TO modes at all wave vectors q, and a zone center TO mode that softens in a manner consistent with that of a ferroelectric soft mode. Below Tdthe zone center TO mode is overdamped. This damping extends up to, but not above, the waterfall wave vector qwf, which is a measure of the average size of the polar nanoregions.

AB - We report neutron inelastic scattering measurements of the lowest-energy transverse optic (TO) phonon branch in the relaxor Pb(Mg1/3Nb2/3)O3from 400 to 1100 K. Far above the Burns temperature Td∼630K we observe well-defined propagating TO modes at all wave vectors q, and a zone center TO mode that softens in a manner consistent with that of a ferroelectric soft mode. Below Tdthe zone center TO mode is overdamped. This damping extends up to, but not above, the waterfall wave vector qwf, which is a measure of the average size of the polar nanoregions.

UR - https://www.scopus.com/pages/publications/84878744722

U2 - 10.1103/PhysRevLett.87.277601

DO - 10.1103/PhysRevLett.87.277601

M3 - 文章

AN - SCOPUS:84878744722

SN - 0031-9007

VL - 87

SP - 277601-277601-4

JO - Physical Review Letters

JF - Physical Review Letters

IS - 27

ER -

Soft Mode Dynamics above and below the Burns Temperature in the Relaxor Pb(Mg1/3Nb2/3)O3

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Soft Mode Dynamics above and below the Burns Temperature in the Relaxor Pb(Mg_1/3Nb_2/3)O₃