EXAFS study of glass transition in K1-x(NH4)xI

被引：2
|
作者：
Yagi, K [1 ]
Sakaue, K
Terauchi, H
机构：
[1] Kwansei Gakuin Univ, Adv Res Ctr Sci, Sanda, Hyogo 6691337, Japan
[2] Kwansei Gakuin Univ, Sch Sci, Sanda, Hyogo 6691337, Japan
来源：
JOURNAL OF SYNCHROTRON RADIATION | 2001年 / 8卷 / 02期
关键词：
EXAFS; glass transition; K1-x(NH4)(x)I;
D O I：
10.1107/S0909049500018331
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
The iodine K-edge EXAFS study of K1-x(NH4)(x)I mixed crystals was performed to clarify the local structure of the dipole glass associated with the random reorientational freezing of ammonium ions. The pair-distribution function of the nearest iodine-iodine ions is strongly reduced with increasing ammonium concentration. The reduction originates in the local distortion of lattice induced by the short-range antiferroelectric order of ammonium ions. We discuss the relationship between the reorientational freezing of ammonium ions and the local distortion of lattice in comparison with the results of X-ray diffraction measurements.
引用
收藏
页码：806 / 808
页数：3
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