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.

引用

页码：101 / 106

页数：6

共 27 条

[1] OXYGEN-ION MIGRATION IN PEROVSKITE-TYPE OXIDES [J].

CHERRY, M ;

ISLAM, MS ;

CATLOW, CRA .

JOURNAL OF SOLID STATE CHEMISTRY, 1995, 118 (01) :125-132

[2] Mixed-valence manganites [J].

Coey, JMD ;

Viret, M ;

von Molnár, S .

ADVANCES IN PHYSICS, 1999, 48 (02) :167-293

[3] Colossal magnetoresistant materials: The key role of phase separation [J].

Dagotto, E ;

Hotta, T ;

Moreo, A .

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 2001, 344 (1-3) :1-153

[4] CORRELATED ELECTRONS IN HIGH-TEMPERATURE SUPERCONDUCTORS [J].

DAGOTTO, E .

REVIEWS OF MODERN PHYSICS, 1994, 66 (03) :763-840

[5] A comparative study of the surface and bulk properties of lanthanum-strontium-manganese oxides La1-xSrxMnO3±δ as a function of Sr-content, oxygen potential and temperature [J].

Decorse, P ;

Caboche, G ;

Dufour, LC .

SOLID STATE IONICS, 1999, 117 (1-2) :161-169

[6] EFFECTS OF DOUBLE EXCHANGE IN MAGNETIC CRYSTALS [J].

DEGENNES, PG .

PHYSICAL REVIEW, 1960, 118 (01) :141-154

[7] Influence of controlled oxygen vacancies on the magnetotransport and magnetostructural phenomena in La0.85Sr0.15MnO3-delta single crystals [J].

DeLeonGuevara, AM ;

Berthet, P ;

Berthon, J ;

Millot, F ;

Revcolevschi, A ;

Anane, A ;

Dupas, C ;

LeDang, K ;

Renard, JP ;

Veillet, P .

PHYSICAL REVIEW B, 1997, 56 (10) :6031-6035

[8] Surface characterization and catalytic properties of perovskite type solid oxide solutions, La0.8Sr0.2BO3( B=Cr, Mn, Fe, Co or Y) [J].

Gunasekaran, N ;

Bakshi, N ;

Alcock, CB ;

Carberry, JJ .

SOLID STATE IONICS, 1996, 83 (1-2) :145-150

[9] CALCULATION OF MULTIPLET STRUCTURE OF CORE PARA-VACANCY LEVELS [J].

GUPTA, RP ;

SEN, SK .

PHYSICAL REVIEW B, 1974, 10 (01) :71-77

[10] CALCULATION OF MULTIPLET STRUCTURE OF CORE P-VACANCY LEVELS .2. [J].

GUPTA, RP ;

SEN, SK .

PHYSICAL REVIEW B, 1975, 12 (01) :15-19

← 1 2 3 →