NEUTRON-SCATTERING STUDY ON PHASE-TRANSITION AT 74-K IN RB2ZNCL4

被引：8
|
作者：
MASHIYAMA, H [1 ]
SUGIMOTO, K [1 ]
OOHARA, Y [1 ]
YOSHIZAWA, H [1 ]
机构：
[1] UNIV TOKYO,INST SOLID STATE PHYS,MINATO KU,TOKYO 106,JAPAN
来源：
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1992年 / 61卷 / 09期
关键词：
D O I：
10.1143/JPSJ.61.3042
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The phase transition at T3=73.5 K in Rb2ZnCl4 is investigated by means Of neutron scattering at JRR-3M(4G). In phase 4 below T3, superlattice reflections appear at the S-point, and their intensity increases continuously with decreasing temperature. The critical index beta estimated from the superlattice intensity is 0.37. The extinction rule within the (h, k, 0) plane is consistent with the space group C1c1. Phonon dispersion of low energy is determined by inelastic scattering. Softening of the phonon branch is observed at the S-point as T3 is approached.
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收藏
页码：3042 / 3045
页数：4
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