Elastic, dielectric, and piezoelectric characterization of 0.92Pb(Zn1/3Nb2/3)O3-0.08PbTiO3 single crystal by Brillouin scattering

• 作者: 刘玉龙 张华 方绍熙 汤冬云 陈昭明
• 来源期刊: 中国物理B（英文版）
• 关键词: ferroelectric relaxor high-resolution Brillouin scattering acoustic phonons
• 年，卷（期）: 2015,（2）
• 页码范围: 027802-1-027802-4
• 页数: 1页
• 语种: 英文
• DOI: 10.1088/1674-1056/24/2/027802

摘要

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 fl ux 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. 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 angleθ are investigated. In particular, the transvers acoustic phonon mode at the low-frequency becomes markedly soft from 28.2 GHz to 18.4 GHz and broadens gradually with the increase ofθ, while its intensity decreases gradually as compared with that of the original one. The possible origins of the results are discussed.