Disorder and mixed valence properties of Sr2FeMoO6 studied by photoelectron diffraction and x-ray absorption spectroscopy

被引：7
作者：
Taguchi, Munetaka [1 ,2 ]
Matsui, Fumihiko [1 ]
Maejima, Naoyuki [1 ]
Matsui, Hirosuke [1 ]
Daimon, Hiroshi [1 ]
机构：
[1] Nara Inst Sci & Technol NAIST, Mat Sci, Nara 6300192, Japan
[2] Toshiba Nanoanal Corp, Phys Anal Technol Ctr, Kawasaki, Kanagawa 2128583, Japan
来源：
SURFACE SCIENCE | 2019年 / 683卷
基金：
日本学术振兴会;
关键词：
Double perovskite; Disorder; Mixed valence; Photoelectron diffraction; X-ray absorption spectroscopy; MAGNETIC-PROPERTIES; MAGNETORESISTANCE; CRYSTAL; OXIDE;
D O I：
10.1016/j.susc.2019.02.001
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A single crystal of the double peroviskite Sr2FeMoO6 has been prepared and was studied by using two-dimensional photoelectron diffraction (2DPED) and x-ray absorption spectroscopy (XAS). We found clear evidence for disorder of Fe3+/Mo5+ by 2DPED experiments, supporting a disorder picture for Sr2FeMoO6. On the other hand, Fe 2p XAS spectra suggested the existence of Fe2+ components (i.e. the mixed valence states) at the surface, but it was suppressed in the bulk. It seems that this fact has complicated a controversy so far concerning the reduction of saturation magnetization of this material.
引用
收藏
页码：53 / 56
页数：4
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