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

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

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.

Original language	English
Pages (from-to)	277601-277601-4
Journal	Physical Review Letters
Volume	87
Issue number	27
DOIs	https://doi.org/10.1103/PhysRevLett.87.277601
State	Published - 31 Dec 2001
Externally published	Yes

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

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",

year = "2001",

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doi = "10.1103/PhysRevLett.87.277601",

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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

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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(Mg_1/3Nb_2/3)O₃

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