| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Elastic, dielectric, and piezoelectric characterization of 0.92Pb(Zn1/3Nb2/3)O3-0.08PbTiO3 single crystal by Brillouin scattering |
| Fang Shao-Xi (方绍熙), Tang Dong-Yun (汤冬云), Chen Zhao-Ming (陈昭明), Zhang Hua (张华), Liu Yu-Long (刘玉龙) |
| Key Laboratory of Multi-scale Manufacturing Technology, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China |
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Abstract In this paper, a complete set of elastic, piezoelectric, and dielectric constants of high-quality tetragonal poled 0.92Pb(Zn1/3Nb2/3)O3-0.08PbTiO3 single crystal grown by the modified flux method is determined using high-resolution Brillouin scattering. A comparison is made between the results obtained by a hybrid method combining ultrasonic and resonant techniques and the results obtained by the Brillouin scattering. The elastic, piezoelectric, and dielectric constants obtained by the two methods are similar. The Brillouin spectrum consists of one longitudinal and two transverse acoustic phonon modes, and the variations of the Brillouin shifts, the full widths at half maximum, and the scattering intensities of these modes with scattering angle θ are investigated. In particular, the transverse acoustic phonon mode at the low-frequency becomes markedly soft from 28.2 GHz to 18.4 GHz and broadens gradually with the increase of θ, while its intensity decreases gradually as compared with that of the original one. The possible origins of the results are discussed.
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Received: 16 September 2014
Revised: 15 October 2014
Accepted manuscript online:
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PACS:
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78.30.-j
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(Infrared and Raman spectra)
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78.35.+c
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(Brillouin and Rayleigh scattering; other light scattering)
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66.20.-d
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(Viscosity of liquids; diffusive momentum transport)
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63.20.D-
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(Phonon states and bands, normal modes, and phonon dispersion)
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| Fund: Project supported by the National Instrumentation Program of China (Grant No. 2011YQ 040136). |
Corresponding Authors:
Zhang Hua, Liu Yu-Long
E-mail: zhanghua@cigit.ac.cn;ylliu@aphy.iphy.ac.cn
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Cite this article:
Fang Shao-Xi (方绍熙), Tang Dong-Yun (汤冬云), Chen Zhao-Ming (陈昭明), Zhang Hua (张华), Liu Yu-Long (刘玉龙) Elastic, dielectric, and piezoelectric characterization of 0.92Pb(Zn1/3Nb2/3)O3-0.08PbTiO3 single crystal by Brillouin scattering 2015 Chin. Phys. B 24 027802
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