Local structure around Mn atom in the LaMnO3+δ system

被引：3

作者：

Subías, G ^{[1
]}

García, J ^{[1
]}

Blasco, J ^{[1
]}

Proietti, MG ^{[1
]}

Sánchez, MC ^{[1
]}

机构：

[1] Univ Zaragoza, CSIC, Inst Ciencia Mat Aragon, Fac Ciencias, E-50009 Zaragoza, Spain

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1999年 / 196卷

关键词：

X-ray absorption spectroscopy; giant magnetoresistance; EXAFS; XANES; manganite;

D O I：

10.1016/S0304-8853(98)00879-8

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Mn K-edge X-ray absorption spectroscopy was used to determine the electronic and geometrical local structure at the Mn site in LaMnO3+delta (delta = 0, 0.07, and 0.15) series. The XANES spectra of LaMnO3+delta samples show a mixed valence oxidation state for the Mn atom similar to that found in La1-xCaxMnO3 series. EXAFS spectra show a distorted Jahn-Teller octahedra for LaMnO3 which is drastically reduced as delta increases. Otherwise, an anomalous structural disorder, reported for the paramagnetic phase in magnetoresistive compounds, is also present at low temperatures in this series. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：534 / 535

页数：2

共 4 条

[1]

KONINGSBERGER DC, 1988, XRAY ABSORPTION TECH

[2] STUDY OF (LA1-XCAX)MNO3 .1. MAGNETIC STRUCTURE OF LAMNO3 [J].

MATSUMOT.G .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1970, 29 (03) :606-+

[3] Influence of oxygen content on the structural, magnetotransport, and magnetic properties of LaMnO3+delta [J].

Ritter, C ;

Ibarra, MR ;

DeTeresa, JM ;

Algarabel, PA ;

Marquina, C ;

Blasco, J ;

Garcia, J ;

Oseroff, S ;

Cheong, SW .

PHYSICAL REVIEW B, 1997, 56 (14) :8902-8911

[4] Local structure at the manganese site in mixed-valence manganites [J].

Subias, G ;

Garcia, J ;

Blasco, J ;

Proietti, MG .

PHYSICAL REVIEW B, 1998, 57 (02) :748-754

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