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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
2008010262.pdf
[fulltext] 193 KB
Title
Neutron scattering study of the normal-incommensurate phase transition in Rb_2ZnBr_4
Creators Shigematsu Hirotake
Creators Mashiyama Hiroyuki
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
https://doi.org/10.1143/JPSJ.69.2905
[isPartOf] [URI]http://www.ipap.jp/jpsj/index.html
Schools 大学院理工学研究科(理学)