Thermal phase transition of RbMnFe(CN)6 observed by X-ray emission and absorption spectroscopy

被引：35

作者：

Osawa, H

Iwazumi, T

Tokoro, H

Ohkoshi, S

Hashimoto, K

Shoji, H

Hirai, E

Nakamura, T

Nanao, S

Isozumi, Y

机构：

[1] Grad Univ Adv Studies, Dept Mat Struct Sci, Tsukuba, Ibaraki 3050801, Japan

[2] Int Mat Struct Sci, Photon Factory, Tsukuba, Ibaraki 3050801, Japan

[3] Univ Tokyo, Adv Sci & Technol Res Ctr, Tokyo 1538904, Japan

[4] Univ Tokyo, Inst Ind Sci, Tokyo 1538505, Japan

[5] Kyoto Univ, Radioisotope Res Ctr, Kyoto 6068501, Japan

来源：

SOLID STATE COMMUNICATIONS | 2003年 / 125卷 / 05期

关键词：

magnetically ordered materials; phase transitions; electronic states (localized); synchrotron radiation; X-ray spectroscopies;

D O I：

10.1016/S0038-1098(02)00805-0

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The thermal phase transition of RbMnFe(CN)(6) has been observed by Mn and Fe 3p-1s X-ray emission spectroscopy (XES) and Is X-ray absorption spectroscopy (XAS). The thermal variations of the spin states and the valences of Mn and Fe were determined to be Mn2+(S = 5/2)-NC-Fe3+(S = 1/2) for the high-temperature (HT) phase and Mn3+(S = 2)-NC-Fe2+(S = 0) for the low-temperature (LT) phase. These transitions are thus caused by charge transfer between Mn and Fe. The temperature dependences of Mn and Fe 3p-1s XES and 1s XAS were observed as the composition of the spectra of the HT and LT phases. The ratios of the HT component in each spectrum show good agreement with the thermal transition curves observed with magnetic susceptibility measurements. Published by Elsevier Science Ltd.

引用

页码：237 / 241

页数：5

共 25 条

[1] A ROOM-TEMPERATURE ORGANOMETALLIC MAGNET BASED ON PRUSSIAN BLUE [J].