We report the observation of an exchange biasing of ferromagnetic Cr-doped GaN films by an antiferromagnetic MnO overlayer. The center of the magnetic hysteresis loop shifts to a negative magnetic field by ∼70 Oe when measured after a positive field cooling. An enhancement of the coercive field of the Cr-doped GaN film is also found when the exchange-biasing MnO overlayer is present. The mechanism responsible for the exchange bias is attributed to the exchange coupling at the ferromagnetic Cr-GaNantiferromagnetic MnO interface.

Original languageEnglish (US)
Article number046106
JournalJournal of Applied Physics
Issue number4
StatePublished - Aug 15 2005

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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