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Competing magnetic interactions in exchange-bias-modulated films
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2010 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 81, no 2, 024420- p.Article in journal (Refereed) Published
Abstract [en]

The magnetization reversal in stripelike exchange-bias-patterned Ni81Fe19/IrMn thin films was investigated by complementary inductive and high-resolution magneto-optical magnetometry, magneto-optical Kerr microscopy, and polarized neutron reflectometry to clarify the effects of competing interfacial exchange-bias and lateral interface contributions. Structures of varying ferromagnetic layer thickness and stripe period were analyzed systematically at the frozen-in domain state of oppositely aligned stripe magnetization. For all samples the mean magnetization of the magnetic hybrid structures was found to be aligned nearly orthogonally with respect to the stripe axis and the set exchange-bias direction. Due to the interaction of interfacial coupling, exchange, and magnetostatic energy contributions, the opening angle of neighboring stripe magnetizations increases with decreasing ferromagnetic layer thickness and increasing stripe period. The experimental observations are in agreement with an earlier proposed model for designing micropatterned exchange-bias films.

Place, publisher, year, edition, pages
2010. Vol. 81, no 2, 024420- p.
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Natural Sciences
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URN: urn:nbn:se:uu:diva-137394DOI: 10.1103/PhysRevB.81.024420ISI: 000274002100068OAI: oai:DiVA.org:uu-137394DiVA: diva2:378803
Available from: 2010-12-16 Created: 2010-12-15 Last updated: 2017-12-11Bibliographically approved

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Wolff, Maximilian

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