Observation of phase transition of cesium manganese hexacyanoferrates by X-ray absorption spectroscopy

被引：4

作者：

Ishiji, Korato ^{[1
]}

Matsuda, Tomoyuki ^{[2
,3
]}

Tokoro, Hiroko ^{[2
,3
]}

Iwazumi, Toshiaki ^{[1
]}

Hashimoto, Kazuhito ^{[2
]}

Ohkoshi, Shin-ichi ^{[2
,3
]}

机构：

[1] Inst Mat Struct Sci, Photon Factory, Tsukuba 3050801, Japan

[2] Univ Tokyo, Sch Engn, Dept Appl Chem, Bunkyo Ku, Tokyo 1138656, Japan

[3] Univ Tokyo, Sch Sci, Dept Chem, Bunkyo Ku, Tokyo 1130033, Japan

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2007年 / 68卷 / 11期

关键词：

A. magnetic materials; B. chemical synthesis; C. XAFS (EXAFS and XANES); D. electrical properties;

D O I：

10.1016/j.jpcs.2007.08.043

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Cesium manganese hexacyanoferrates exhibit an interesting phenomenon of temperature-induced phase transition accompanied by a variation in the magnetic susceptibility. We observed the variation in the electronic state of Mn during the phase transition by using X-ray absorption spectroscopy. The results of the analyses showed that the content ratio of Fe-II-CN-Mn-III and Fe-III-CN-Mn-II systematically varied during the phase transition. However, the ratio of Fe-II-CN-Mn-II remained constant at almost all temperatures. These results suggest that the charge transfer between Fe and Mn ions in the Fe-II-CN-Mn-II or the Fe-II-N-Mn-III bond produces the phase transition. (c) 2007 Published by Elsevier Ltd.

引用

页码：2158 / 2161

页数：4

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