Link between perpendicular coupling and exchange biasing in Fe3O4/CoO multilayers

Title:
Link between perpendicular coupling and exchange biasing in Fe3O4/CoO multilayers
Authors:
Ijiri, Yumi; Schulthess, Thomas C.; Borchers, Julie A.; van der Zaag, P. J.; Erwin, R. W.
Abstract:
In studying well-characterized, exchange-biased Fe3O4/CoO superlattices, we demonstrate a causal link between the exchange bias effect and the perpendicular coupling of the ferrimagnetic and antiferromagnetic spins. Neutron diffraction studies reveal that for thin CoO layers the onset temperature for exchange biasing TB matches the onset of locked-in, preferential perpendicular coupling of the spins, rather than the antiferromagnetic ordering temperature TN. The results are explained by considering the role of anisotropic exchange first proposed by Dzyaloshinsky and Moriya and developing a model based purely on information on structural defects and exchange for these oxides. The devised mechanism provides a general explanation of biasing in systems with perpendicular coupling.
Citation:
Ijiri, Y., T. C. Schulthess, J. A. Borchers, P. J. van der Zaag, et al. 2007. "Link between perpendicular coupling and exchange biasing in Fe3O4/CoO multilayers." Physical Review Letters 99.
Publisher:
American Physical Society
DATE ISSUED:
2007
Department:
Physics and Astronomy
Type:
article
PUBLISHED VERSION:
10.1103/PhysRevLett.99.147201
PERMANENT LINK:
http://hdl.handle.net/11282/310324

Full metadata record

DC FieldValue Language
dc.contributor.authorIjiri, Yumien_US
dc.contributor.authorSchulthess, Thomas C.en_US
dc.contributor.authorBorchers, Julie A.en_US
dc.contributor.authorvan der Zaag, P. J.en_US
dc.contributor.authorErwin, R. W.en_US
dc.date.accessioned2013-12-23T16:30:32Zen
dc.date.available2013-12-23T16:30:32Zen
dc.date.issued2007en
dc.identifier.citationIjiri, Y., T. C. Schulthess, J. A. Borchers, P. J. van der Zaag, et al. 2007. "Link between perpendicular coupling and exchange biasing in Fe3O4/CoO multilayers." Physical Review Letters 99.en_US
dc.identifier.issn0031-9007en_US
dc.identifier.urihttp://hdl.handle.net/11282/310324en
dc.description.abstractIn studying well-characterized, exchange-biased Fe3O4/CoO superlattices, we demonstrate a causal link between the exchange bias effect and the perpendicular coupling of the ferrimagnetic and antiferromagnetic spins. Neutron diffraction studies reveal that for thin CoO layers the onset temperature for exchange biasing TB matches the onset of locked-in, preferential perpendicular coupling of the spins, rather than the antiferromagnetic ordering temperature TN. The results are explained by considering the role of anisotropic exchange first proposed by Dzyaloshinsky and Moriya and developing a model based purely on information on structural defects and exchange for these oxides. The devised mechanism provides a general explanation of biasing in systems with perpendicular coupling.en_US
dc.publisherAmerican Physical Societyen_US
dc.identifier.doi10.1103/PhysRevLett.99.147201en
dc.subject.departmentPhysics and Astronomyen_US
dc.titleLink between perpendicular coupling and exchange biasing in Fe3O4/CoO multilayersen_US
dc.typearticleen_US
dc.identifier.journalPhysical Review Lettersen_US
dc.identifier.volume99en_US
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