Orbital occupation, atomic moments, and magnetic ordering at interfaces of manganite thin films

被引：83
作者：
Aruta, C. [1 ]
Ghiringhelli, G. [2 ]
Bisogni, V. [3 ]
Braicovich, L. [2 ]
Brookes, N. B. [3 ]
Tebano, A. [4 ,5 ]
Balestrino, G. [4 ,5 ]
机构：
[1] Univ Naples Federico II, Dipartimento Sci Fis, CNR, INFM Coherentia, I-80126 Naples, Italy
[2] Politecn Milan, Dipartimento Fis, CNR, INFM Coherentia & Soft, I-20133 Milan, Italy
[3] European Synchrotron Radiat Facil, F-38043 Grenoble, France
[4] Univ Roma Tor Vergata, CNR, INFM Coherentia, I-00133 Rome, Italy
[5] Univ Roma Tor Vergata, Dipartimento Ingn Meccan, I-00133 Rome, Italy
来源：
PHYSICAL REVIEW B | 2009年 / 80卷 / 01期
关键词：
antiferromagnetic materials; ferromagnetic materials; lanthanum compounds; magnetic anisotropy; magnetic circular dichroism; magnetic moments; magnetic thin films; magnetostriction; strontium compounds; HOLE-DOPED MANGANITES; CIRCULAR-DICHROISM; STRAIN; OXIDES; SPECTROSCOPY; SURFACE;
D O I：
10.1103/PhysRevB.80.014431
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We have performed x-ray linear and circular magnetic dichroism experiments at the Mn L-2,L-3 edge of the La0.7Sr0.3MnO3 ultrathin films. Our measurements show that the antiferromagnetic (AF) insulating phase is stabilized by the interfacial rearrangement of the Mn 3d orbitals, despite the relevant magnetostriction anisotropic effect on the double-exchange ferromagnetic (FM) metallic phase. As a consequence, the Mn atomic magnetic-moment orientation and how it reacts to strain differ in the FM and AF phases. In some cases a FM insulating (FMI) phase adds to the AF and FM. Its peculiar magnetic properties include in-plane magnetic anisotropy and partial release of the orbital moment quenching. Nevertheless the FMI phase appears little coupled to the other ones.
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页数：8
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