Neutron scattering study of K2ZnBr4

✍ Scribed by H. Mashiyama; M. Takesada; T. Yagi; H. Shigematsu; Y. Oohara

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 193 KB
• Volume: 219-220
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/0921-4526(95)00815-2

✦ Synopsis

An inelastic neutron scattering study has been performed on the single crystal of monoclinic KzZnBr4. Dispersion relations for transverse acoustic (TA) phonons were determined in the a*, a*-¢*, c*, 2a*-c* and b* directions at room temperature. In addition to the TA mode, low-energy modes were observed in the scan along the 2a*-¢* direction. The temperature dependence of the low-energy mode suggests that an optical mode softens at the paraelectric ferroelectric transition of 155 K.