Mashiyama Hiroyuki
Affiliate Master
Yamaguchi University
Neutron scattering study of the normal-incommensurate phase transition in Rb_2ZnBr_4
Journal of the Physical Society of Japan Volume 69 Issue 9
Page 2905-2909
published_at 2000
Title
Neutron scattering study of the normal-incommensurate phase transition in Rb_2ZnBr_4
Creators
Takesada Masaki
Creators
Ohshima Ken-ichi
Creators
Oohara Yasuaki
Creators
Matsui Tsuneo
Creator Keywords
neutron scattering
phase mode
amplitude mode
normal-incommensurate phase transition
Rb_2ZnBr_4
ferroelectrics
The soft phonon modes, which are related to the normal-incommensurate phase transition of Rb_2ZnBr_4, have been measured by inelastic neutron scattering. The existence of both phase and amplitude modes has been confirmed, and the phonon dispersion curves have been determined in the low-temperature commensurate phase. On the other hand, the phonon dispersion curve of the transverse acoustic phonon along the (0 0 ξ) direction does not vary appreciably in the normal phase. The soft mode is fully overdamped above the normal-incommensurate phase transition. Diffuse scattering develops around h0l±5/17 as temperature approaches T_i ＝347 K from above.
Languages
eng
Resource Type
journal article
Publishers
The Physical Society of Japan
Date Issued
2000
Rights
Copyright c (2002)The Physical Society of Japan()
File Version
Author’s Original
Access Rights
open access
Relations
[ISSN]0031-9015
[NCID]AA00704814
[isPartOf]
[URI]http://www.ipap.jp/jpsj/index.html
Schools
大学院理工学研究科（理学）