Broadband gigahertz dynamics of relaxor ferroelectric Pb(Sc 1/2Nb1/2)O3-xPbTiO3 single crystal probed by Brillouin scattering

S. Kojima; S. Tsukada; Y. Hidaka; A. A. Bokov; Z. G. Ye

doi:10.1063/1.3581025

Broadband gigahertz dynamics of relaxor ferroelectric Pb(Sc _1/2Nb_1/2)O₃-xPbTiO₃ single crystal probed by Brillouin scattering

S. Kojima
, S. Tsukada
, Y. Hidaka
, A. A. Bokov
, Z. G. Ye

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

32 Scopus citations

Abstract

The broadband gigahertz dynamics of a relaxor ferroelectric crystal 0.70Pb(Sc_1/2Nb_1/2)O₃-0.30PbTiO₃ with a composition close to the starting point of the morphotropic phase boundary is studied by Brillouin scattering. The significant anomaly of the longitudinal acoustic (LA) mode is observed in the vicinity of the Curie temperature, T _C = 500 K. Upon cooling, it starts below the Burns temperature, T_B = 670 K, due to the interaction between the LA mode and dynamic polar nanoregions (PNRs). The broad central peak (CP) clearly appears below T_B, and its intensity becomes a maximum at T_C. The relaxation time, τ_CP, determined from the CP width, shows the typical critical slowing down of the order-disorder phase transition in the vicinity of T_C. The size of a dynamic PNR significantly increases below the intermediate temperature, T* = 562 K.

Original language	English
Article number	084114
Journal	Journal of Applied Physics
Volume	109
Issue number	8
DOIs	https://doi.org/10.1063/1.3581025
State	Published - 15 Apr 2011
Externally published	Yes

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title = "Broadband gigahertz dynamics of relaxor ferroelectric Pb(Sc 1/2Nb1/2)O3-xPbTiO3 single crystal probed by Brillouin scattering",

abstract = "The broadband gigahertz dynamics of a relaxor ferroelectric crystal 0.70Pb(Sc1/2Nb1/2)O3-0.30PbTiO3 with a composition close to the starting point of the morphotropic phase boundary is studied by Brillouin scattering. The significant anomaly of the longitudinal acoustic (LA) mode is observed in the vicinity of the Curie temperature, T C = 500 K. Upon cooling, it starts below the Burns temperature, TB = 670 K, due to the interaction between the LA mode and dynamic polar nanoregions (PNRs). The broad central peak (CP) clearly appears below TB, and its intensity becomes a maximum at TC. The relaxation time, τCP, determined from the CP width, shows the typical critical slowing down of the order-disorder phase transition in the vicinity of TC. The size of a dynamic PNR significantly increases below the intermediate temperature, T* = 562 K.",

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doi = "10.1063/1.3581025",

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AU - Kojima, S.

AU - Tsukada, S.

AU - Hidaka, Y.

AU - Bokov, A. A.

AU - Ye, Z. G.

PY - 2011/4/15

Y1 - 2011/4/15

N2 - The broadband gigahertz dynamics of a relaxor ferroelectric crystal 0.70Pb(Sc1/2Nb1/2)O3-0.30PbTiO3 with a composition close to the starting point of the morphotropic phase boundary is studied by Brillouin scattering. The significant anomaly of the longitudinal acoustic (LA) mode is observed in the vicinity of the Curie temperature, T C = 500 K. Upon cooling, it starts below the Burns temperature, TB = 670 K, due to the interaction between the LA mode and dynamic polar nanoregions (PNRs). The broad central peak (CP) clearly appears below TB, and its intensity becomes a maximum at TC. The relaxation time, τCP, determined from the CP width, shows the typical critical slowing down of the order-disorder phase transition in the vicinity of TC. The size of a dynamic PNR significantly increases below the intermediate temperature, T* = 562 K.

AB - The broadband gigahertz dynamics of a relaxor ferroelectric crystal 0.70Pb(Sc1/2Nb1/2)O3-0.30PbTiO3 with a composition close to the starting point of the morphotropic phase boundary is studied by Brillouin scattering. The significant anomaly of the longitudinal acoustic (LA) mode is observed in the vicinity of the Curie temperature, T C = 500 K. Upon cooling, it starts below the Burns temperature, TB = 670 K, due to the interaction between the LA mode and dynamic polar nanoregions (PNRs). The broad central peak (CP) clearly appears below TB, and its intensity becomes a maximum at TC. The relaxation time, τCP, determined from the CP width, shows the typical critical slowing down of the order-disorder phase transition in the vicinity of TC. The size of a dynamic PNR significantly increases below the intermediate temperature, T* = 562 K.

UR - https://www.scopus.com/pages/publications/79955719155

U2 - 10.1063/1.3581025

DO - 10.1063/1.3581025

M3 - 文章

AN - SCOPUS:79955719155

SN - 0021-8979

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JO - Journal of Applied Physics

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ER -

Broadband gigahertz dynamics of relaxor ferroelectric Pb(Sc _1/2Nb_1/2)O₃-xPbTiO₃ single crystal probed by Brillouin scattering

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