Role of Oxygen 2p states for anti-ferromagnetic interfacial coupling and positive exchange bias of ferromagnetic LSMO/SRO bilayers

We have investigated possible physical origins of the anti-ferromagnetic exchange interaction of ferromagnetic La 2/3Sr 1/3MnO 3/SrRuO 3 (LSMO/SRO) bilayers reported to have a positive exchange bias. We have performed first principles calculations with both ferro, and anti-ferromagnetic spin configu...

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Bibliographic Details
Published in:Journal of alloys and compounds 2008-02, Vol.450 (1), p.1-6
Main Authors: Lee, Yongbin, Caes, Benjamin, Harmon, B.N.
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Electronic band structure
Exact sciences and technology
Interfacial magnetic properties (multilayers, magnetic quantum wells, superlattices, magnetic heterostructures)
Magnetic properties and materials
Magnetic properties of surface, thin films and multilayers
Magnetically ordered materials
Magnetotransport phenomena, materials for magnetotransport
Manganites
Oxide materials
Physics
Surfaces and interfaces
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Summary:We have investigated possible physical origins of the anti-ferromagnetic exchange interaction of ferromagnetic La 2/3Sr 1/3MnO 3/SrRuO 3 (LSMO/SRO) bilayers reported to have a positive exchange bias. We have performed first principles calculations with both ferro, and anti-ferromagnetic spin configurations for these layers and found that anti-ferromagnetic spin configuration has lower total energy. The role of 2p states of oxygen atoms located at the interface and their interaction with neighbors account for this magnetic ordering preference.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2006.10.085