Exchange coupling and exchange bias in FM/AFM bilayers for a fully compensated AFM interface
2009 (English)In: Acta Physica Polonica. A, ISSN 0587-4246, Vol. 115, no 1, 25-29 p.Article in journal (Refereed) Published
We address the interlayer coupling in a ferromagnet/antiferromagnet bilayer where the interface of theantiferromagnet is fully compensated. We discuss the role of di®erent types of exchange interaction for theinterlayer coupling and exchange bias. We propose two types of corrections to the ideal Heisenberg Hamiltonianwhich may explain exchange bias. The ¯rst is a correction for the angular dependence of the exchange interactionsand the second a correction due to magnetostriction and interface imperfections. The ¯rst correction contributes toan anisotropy at the interface and favors either parallel or perpendicular coupling across the interface. The secondcorrection contributes to the exchange bias. Our analysis is based on atomic spin dynamics simulations, and ourresults show that small corrections to the ideal Heisenberg Hamiltonian may have macroscopic consequences insystems with frustrated interatomic interactions.
Place, publisher, year, edition, pages
2009. Vol. 115, no 1, 25-29 p.
IdentifiersURN: urn:nbn:se:uu:diva-96093ISI: 000263757900004OAI: oai:DiVA.org:uu-96093DiVA: diva2:170555