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

TitleRole of oxygen 2p states for anti-ferromagnetic interfacial coupling and positive exchange bias of ferromagnetic LSMO/SRO bilayers
Publication TypeJournal Article
Year of Publication2008
AuthorsLee YB, Caes B, Harmon BN
Journal TitleJournal of Alloys and Compounds
Volume450
Pages1-6
Date PublishedFeb
Type of ArticleArticle
ISBN Number0925-8388
Accession NumberISI:000252860900002
Keywordsanisotropy, electronic band structure, electronic-structure, INTERFACES, LA1-XCAXMNO3, LAMNO3, magnetic-properties, magnetically ordered materials, MANGANITES, oxide materials, oxides, SRRUO3, surfaces and, thin-films
Abstract

We have investigated possible physical origins of the anti-ferromagnetic exchange interaction of ferromagnetic La2/3Sr1/3MnO3/SrRuO3 (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. Published by Elsevier B.V.

DOI10.1016/j.jallcom.2006.10.085
Alternate JournalJ. Alloy. Compd.