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Reversal of exchange bias in nanocrystalline antiferromagnetic-ferromagnetic bilayers

TitleReversal of exchange bias in nanocrystalline antiferromagnetic-ferromagnetic bilayers
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication2002
AuthorsPrados, C., Pina E., Hernando A., and Montone Amelia
JournalJournal of Physics Condensed Matter
Volume14
Pagination10063-10074
ISSN09538984
KeywordsAntiferromagnetic materials, Antiferromagnetic-ferromagnetic bilayers, Asymmetric magnetization reversal processes, Atomic force microscopy, Exchange bias, Ferromagnetic materials, Grain boundaries, Ion exchange, Magnetic field effects, Magnetic training processes, Magnetization, Nanostructured materials, Temperature
Abstract

The sign of the exchange bias in field cooled nanocrystalline antiferromagnetic-ferromagnetic bilayers (Co-O and Ni-O/permalloy) is reversed at temperatures approaching the antiferromagnetic (AFM) blocking temperature. A similar phenomenon is observed after magnetic training processes at similar temperatures. These effects can be explained assuming that the boundaries of nanocrystalline grains in AFM layers exhibit lower transition temperatures than grain cores.

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URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-0037020926&doi=10.1088%2f0953-8984%2f14%2f43%2f305&partnerID=40&md5=4a4710e4e58f6fe91cf18bb9675b4486
DOI10.1088/0953-8984/14/43/305
Citation KeyPrados200210063