Anisotropic ESR linewidth and Jahn-Teller distortions in La7/8Sr1/8MnO3

被引：5

作者：

Alejandro, G ^{[1
]}

Causa, MT

Ramos, CA

Tovar, M

Fontcuberta, J

机构：

[1] Comis Nacl Energia Atom, Ctr Atom Bariloche, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina

[2] Comis Nacl Energia Atom, Inst Balseiro, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina

[3] Univ Nacl Cuyo, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina

[4] CSIC, Inst Ciencia Mat Barcelona, Bellaterra 08193, Catalunya, Spain

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2001年 / 226卷 / 2002-2003期

关键词：

Jahn-Teller effect; electron paramagnetic resonance-linewidth; magnetoresistance-giant;

D O I：

10.1016/S0304-8853(00)00677-6

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Electron spin resonance (ESR) measurements in a La7/8Sr1/8MnO3 single crystal are presented. Special attention is paid to the paramagnetic (PM) regime, where an anisotropic peak- to-peak linewidth is found. The angular variation for the static magnetic field, H-0, in the (001), (010), and (110) planes indicates a tetragonal (D-4.) symmetry for the ESR spectrum, where the c direction is the four-fold axis. The anisotropy is strongly T dependent, it is larger in the Jahn-Teller (JT) distorted O' phase and decreases gradually with temperature. A small anisotropy is still present above T-JT for H-0 in the (110) plane, suggesting the persistence of local JT distortions. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：2002 / 2003

页数：2

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