Ultrathin limit of exchange bias coupling at oxide multiferroic/ ferromagnetic interfaces

Publication Type	Journal Article

Authors	M Huijben P Yu L.W Martin H.J.A Molegraaf Y.-H Chu M.B Holcomb N Balke G Rijnders Ramamoorthy Ramesh
DOI	10.1002/adma.201300940
Abstract	Exchange bias coupling at the multiferroic- ferromagnetic interface in BiFeO3/La0.7Sr0.3MnO3 heterostructures exhibits a critical thickness for ultrathin BiFeO3 layers of 5 unit cells (2 nm). Linear dichroism measurements demonstrate the dependence on the BiFeO3 layer thickness with a strong reduction for ultrathin layers, indicating diminished antiferromagnetic ordering that prevents interfacial exchange bias coupling. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Notes	cited By 41
Journal	Advanced Materials
Volume	25
Year of Publication	2013
Number	34
Pagination	4739-4745
ISSN Number	09359648
Keywords	Manganese oxide Multiferroics Ferromagnetism Exchange bias Ferromagnetic materials Heterojunctions Antiferromagnetic orderings Interfaces (materials) Critical thickness Exchange bias couplings Ferromagnets Interfacial exchanges Linear dichroism
Organizations	No Organization
Research Areas	Ramesh Lab
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