Critical slowing down of relaxation dynamics near the Curie temperature in the relaxor Pb (Sc0.5 Nb0.5) O3

Muhtar Ahart; Anwar Hushur; Yonghong Bing; Zuo Guang Ye; Russell J. Hemley; Seiji Kojima

doi:10.1063/1.3115765

Critical slowing down of relaxation dynamics near the Curie temperature in the relaxor Pb (Sc_0.5 Nb_0.5) O₃

Muhtar Ahart
, Anwar Hushur
, Yonghong Bing
, Zuo Guang Ye
, Russell J. Hemley
, Seiji Kojima

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

25 Scopus citations

Abstract

Brillouin spectroscopy of Pb (Sc_0.5 Nb_0.5) O3 single crystals reveals an order-disorder ferroelectric phase transition occurs at 110 °C upon cooling. A softening of the longitudinal acoustic (LA) mode is observed that can be attributed to the coupling between polar nanoregions and acoustic modes. A critical slowing down of the central peak, a feature of order-disorder ferroelectric phase transitions, is observed near Tc. The similarity in temperature dependences of the two kinds of relaxation times determined from the central peak and LA mode suggests that the changes in the central peak arise from local polarization fluctuations in the polar nanoregions.

Original language	English
Article number	142906
Journal	Applied Physics Letters
Volume	94
Issue number	14
DOIs	https://doi.org/10.1063/1.3115765
State	Published - 2009
Externally published	Yes

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title = "Critical slowing down of relaxation dynamics near the Curie temperature in the relaxor Pb (Sc0.5 Nb0.5) O3",

abstract = "Brillouin spectroscopy of Pb (Sc0.5 Nb0.5) O3 single crystals reveals an order-disorder ferroelectric phase transition occurs at 110 °C upon cooling. A softening of the longitudinal acoustic (LA) mode is observed that can be attributed to the coupling between polar nanoregions and acoustic modes. A critical slowing down of the central peak, a feature of order-disorder ferroelectric phase transitions, is observed near Tc. The similarity in temperature dependences of the two kinds of relaxation times determined from the central peak and LA mode suggests that the changes in the central peak arise from local polarization fluctuations in the polar nanoregions.",

author = "Muhtar Ahart and Anwar Hushur and Yonghong Bing and Ye, \{Zuo Guang\} and Hemley, \{Russell J.\} and Seiji Kojima",

year = "2009",

doi = "10.1063/1.3115765",

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T1 - Critical slowing down of relaxation dynamics near the Curie temperature in the relaxor Pb (Sc0.5 Nb0.5) O3

AU - Ahart, Muhtar

AU - Hushur, Anwar

AU - Bing, Yonghong

AU - Ye, Zuo Guang

AU - Hemley, Russell J.

AU - Kojima, Seiji

PY - 2009

Y1 - 2009

N2 - Brillouin spectroscopy of Pb (Sc0.5 Nb0.5) O3 single crystals reveals an order-disorder ferroelectric phase transition occurs at 110 °C upon cooling. A softening of the longitudinal acoustic (LA) mode is observed that can be attributed to the coupling between polar nanoregions and acoustic modes. A critical slowing down of the central peak, a feature of order-disorder ferroelectric phase transitions, is observed near Tc. The similarity in temperature dependences of the two kinds of relaxation times determined from the central peak and LA mode suggests that the changes in the central peak arise from local polarization fluctuations in the polar nanoregions.

AB - Brillouin spectroscopy of Pb (Sc0.5 Nb0.5) O3 single crystals reveals an order-disorder ferroelectric phase transition occurs at 110 °C upon cooling. A softening of the longitudinal acoustic (LA) mode is observed that can be attributed to the coupling between polar nanoregions and acoustic modes. A critical slowing down of the central peak, a feature of order-disorder ferroelectric phase transitions, is observed near Tc. The similarity in temperature dependences of the two kinds of relaxation times determined from the central peak and LA mode suggests that the changes in the central peak arise from local polarization fluctuations in the polar nanoregions.

UR - https://www.scopus.com/pages/publications/64349123894

U2 - 10.1063/1.3115765

DO - 10.1063/1.3115765

M3 - 文章

AN - SCOPUS:64349123894

SN - 0003-6951

VL - 94

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 14

M1 - 142906

ER -

Critical slowing down of relaxation dynamics near the Curie temperature in the relaxor Pb (Sc_0.5 Nb_0.5) O₃

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