Reversal of exchange bias in nanocrystalline antiferromagnetic-ferromagnetic bilayers

C. Prados, E. Pina, A. Hernando, A. Montone

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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.
Original languageEnglish
Pages (from-to)10063 - 10074
Number of pages12
JournalJournal of Physics Condensed Matter
Issue number43
Publication statusPublished - 4 Nov 2002
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics

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