Direct evidence of imprinted vortex states in the antiferromagnet of exchange biased microdisks

Salazar-Alvarez, GermanKTH,Materialvetenskap,Wallenberg Wood Science Center (författare)

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.
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.

Ingår i:Applied Physics Letters: AIP Publishing95:1, s. 012510-0003-69511077-3118

Av författaren/redakt...: Salazar-Alvarez, ...; Kavich, J. J.; Sort, J.; Mugarza, A.; Stepanow, S.; Potenza, A.; visa fler...; Marchetto, H.; Dhesi, S. S.; Baltz, V.; Dieny, B.; Weber, A.; Heyderman, L. J.; Nogues, J.; Gambardella, P.; visa färre...

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