Direct evidence of imprinted vortex states in the antiferromagnet of exchange biased microdisks
2009 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 95, no 1, 012510- p.Article in journal (Refereed) Published
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.
IdentifiersURN: urn:nbn:se:kth:diva-32567DOI: 10.1063/1.3168515ISI: 000267983200055ScopusID: 2-s2.0-67650480849OAI: oai:DiVA.org:kth-32567DiVA: diva2:411245
FunderEU, European Research Council, 203239
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.2011-04-182011-04-152011-04-18Bibliographically approved