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

页码：53 / 56

页数：4

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