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Direct evidence of imprinted vortex states in the antiferromagnet of exchange biased microdisks
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering. KTH, School of Chemical Science and Engineering (CHE), Centres, Wallenberg Wood Science Center.
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2009 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 95, no 1, 012510- p.Article in journal (Refereed) Published
Abstract [en]

The magnetic domain structure of patterned antiferromagnetic/ferromagnetic Ir20Mn80/Ni80Fe20 bilayer microdisk arrays has been investigated using layer-specific polarized x-ray photoemission electron microscopy and magnetic circular dichroism. Magnetic imaging at the Fe and Mn L-edge resonances provided direct evidence of a vortex state imprinted into the antiferromagnet at the interface. The opposite magnetic contrast between the layers indicated a reversed chirality of the imprinted vortex state, and a quantitative analysis of the magnetic moment from the dichroism spectra showed that uncompensated Mn spins equivalent to about 60% of a monolayer of bulk Ir20Mn80 contributed to the imprinted information at the interface.

Place, publisher, year, edition, pages
2009. Vol. 95, no 1, 012510- p.
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Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-32567DOI: 10.1063/1.3168515ISI: 000267983200055Scopus ID: 2-s2.0-67650480849OAI: oai:DiVA.org:kth-32567DiVA: diva2:411245
Funder
EU, European Research Council, 203239
Note
QC 20110418 Korrigering: This article was originally published online and in print with an error in the fifth author’s name in Ref. 13; the correct spelling of the author’s name should have been E. Menéndez. AIP apologizes for this error. All online versions of the article have been corrected.Available from: 2011-04-18 Created: 2011-04-15 Last updated: 2017-12-11Bibliographically approved

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