X-ray magnetic circular dichroism on La2/3Ca1/3Mn0.97Fe0.03O3 thin films

被引：4

作者：

Figueroa, Adriana I. ^{[1
]}

Campillo, Gloria E. ^{[2
]}

Baker, Alexander A. ^{[1
,3
]}

Osorio, Jaime A. ^{[4
]}

Arnache, Oscar L. ^{[4
]}

van der Laan, Gerrit ^{[1
]}

机构：

[1] Diamond Light Source, Magnet Spect Grp, Didcot, Oxon, England

[2] Univ Medellin, Dept Ciencias Basicas, Grp Mat Nanoestruct & Biomodelac, Medellin, Colombia

[3] Univ Oxford, Dept Phys, Clarendon Lab, Oxford OX1 3PU, England

[4] Univ Antioquia, Inst Fis, Fac Ciencias Exactas & Nat, Grp Estado Solido, Medellin, Colombia

来源：

SUPERLATTICES AND MICROSTRUCTURES | 2015年 / 87卷

基金：

英国工程与自然科学研究理事会;

关键词：

X-ray magnetic circular dichroism; Magnetic thin films; Magnetic interactions; Complex oxides; COLOSSAL MAGNETORESISTANCE; HYPERFINE INTERACTIONS;

D O I：

10.1016/j.spmi.2015.07.009

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The element-selective technique of X-ray magnetic circular dichroism (XMCD) has been used to study the magnetic properties of La2/3Ca1/3Mn0.97Fe0.03O3 (LCMFO) thin films. XMCD measurements below the ferromagnetic ordering temperature at the Mn and Fe L-2,L-3 absorption edges allow the determination of the contributions and relative orientations of the Mn and Fe magnetic moments. A reduction in the Mn L-2,L-3 XMCD signal of the LCMFO sample compared to that for the parent La2/3Ca1/3MnO3 (LCMO) system reveals important modifications in the electronic and magnetic properties with the presence of Fe. The Fe L-2,L-3 X-ray absorption (XAS) for the LCMFO film is characteristic of Fe3+, and the comparison with multiplet calculations shows that the Fe dopants occupy octahedral sites in the crystal, which is consistent with Fe3+ substituting Mn3+ in LCMO. The magnetic moments of Mn and Fe are found to align antiparallel, which suggests the presence of Mn-O-Fe superexchange coupling. This result is consistent with macroscopic magnetometry measurements on the LCMFO system, which show a decrease in saturation magnetization of LCMO with Fe doping. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：42 / 46

页数：5

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