Competitive antiferromagnetic and ferromagnetic coupling in a CrSe/Fe/GaAs(111)B structure

C. Wang*, B. Zhang, B. You, S. K. Lok, S. K. Chan, Xixiang Zhang, G. K.L. Wong, I. K. Sou

*Corresponding author for this work

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A novel transition from the negative exchange bias (NEB) to the positive exchange bias (PEB), due to coexistent and competitive ferromagnetic and antiferromagnetic coupling in a molecular-beam-expitaxy-grown CrSe/Fe/GaAs(111)B structure, is described. The source of the unusual PEB effect was found to originate from the interface at the hetero-junction of Fe/GaAs(111)B while the NEB effect resulted from the CrSe/Fe bilayer structure. Phenomenological models are presented to explain the mechanism of the PEB effect and the varying asymmetry of the magnetic hysteresis of this structure as a function of the measured temperature.

Original languageEnglish (US)
Article number023916
JournalJournal of Applied Physics
Issue number2
StatePublished - Aug 12 2008

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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