Extendedx-rayabsorptionfinestructurestudyofMnFeP0.56Si0.44compound

被引：0

作者：

李英杰 ^{[1
]}

哈斯朝鲁 ^{[1
]}

乌仁图雅 ^{[1
]}

宋志强 ^{[1
]}

欧志强 ^{[1
]}

特古斯 ^{[2
]}

中井生央 ^{[2
]}

机构：

[1] Inner Mongolia Key Laboratory for Physics and Chemistry of Functional Materials,Physics and Electronic Information College, Inner Mongolia Normal University

[2] Department of Electrical and Electronic Engineering, Tottori University

来源：

Chinese Physics B | 2015年 / 08期

关键词：

Mn Fe P0.56Si0.44 compound; Mn K edge; Fe K edge; EXAFS; local structure;

D O I：

暂无

中图分类号：

O434.1 [X射线];

学科分类号：

070207 ; 0803 ;

摘要：

The Mn Fe P0.56Si0.44 compound is investigated by x-ray diffraction, magnetic measurements, and x-ray absorption fine structure spectroscopy. It crystallizes in Fe2P-type structure with the lattice parameters a = b = 5.9823(0)  and c = 3.4551(1)  and undergoes a first-order phase transition at the Curie temperature of 255 K. The Fe K edge and Mn K edge x-ray absorption fine structure spectra show that Mn atoms mainly reside at 3g sites, while 3f sites are occupied by Fe atoms. The distances between the absorbing Fe atom and the first and second nearest neighbor Fe atoms in a 3f-layer shift from 2.65  and 4.01  in the ferromagnetic state to 2.61  and 3.96  in the paramagnetic phase. On the other hand, the distance between the 3g-layer and 3f-layer changes a little as 2.66 –2.73  below the Curie temperature and2.68 –2.75  above it.

引用

页码：444 / 449

页数：6