Degradation of La0.8Ca0.2MnO3 single crystal surface:: Electron spectroscopy studies

被引：23
作者：
Chaika, AN [1 ]
Ionov, AM
Tulina, NA
Shulyatev, DA
Mukovskii, YM
机构：
[1] Russian Acad Sci, Inst Solid State Phys, Chernogolovka 142432, Moscow Dist, Russia
[2] Moscow State Steel & Alloys Inst, Moscow 119049, Russia
来源：
JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA | 2005年 / 148卷 / 02期
基金：
俄罗斯基础研究基金会;
关键词：
photoelectron spectroscopy; doped manganites;
D O I：
10.1016/j.elspec.2005.04.003
中图分类号：
O433 [光谱学];
学科分类号：
0703 ; 070302 ;
摘要：
The electronic structure of degraded (as grown and chemically polished) and ion-sputtered La0.8Ca0.2MnO3 single crystal surfaces has been studied by X-ray photoemission and Auger electron spectroscopy techniques. XPS spectra of deep core levels (Mn2p, 0 Is, La3d, La4d) were taken from as grown, chemically polished and cleaned in UHV by Ar+ ion-bombardment surfaces. XPS data show different oxidation state of Mn and La ions on the degraded and ion-sputtered surfaces of the manganite crystal. Mn2p(3/2) line width and energy position suggest mixed valence state of the manganese ions at the degraded and ion-sputtered crystal surfaces. (c) 2005 Elsevier B.V. All rights reserved.
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收藏
页码：101 / 106
页数：6
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