Exchange bias and blocking temperature in Co/FeMn/CuNi trilayers

M. G. Blamire, M. Ali, Chi Wah Leung, C. H. Marrows, B. J. Hickey

Research output: Journal article publicationJournal articleAcademic researchpeer-review

47 Citations (Scopus)

Abstract

Aspects of exchange bias between antiferromagnets and ferromagnets remain unclear despite recent research. An outstanding issue is the relationship between exchange bias and enhanced coercivity in the ferromagnetic layer. This Letter reports the unexpected finding that a substantial exchange bias can be generated between an antiferromagnet (FeMn) with a higher ordering temperature than that of the ferromagnet (CuNi). We interpret the result in terms of a temperature-dependent competition between interfacial exchange and antiferromagnet anisotropy energies. Crossover of these energies during cooling is responsible for the onset of exchange bias at the blocking temperature.
Original languageEnglish
Article number217202
JournalPhysical Review Letters
Volume98
Issue number21
DOIs
Publication statusPublished - 23 May 2007
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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