1 results for Anderson, P.A.

  • Magnetic and optical properties of the InCrN system

    Anderson, P.A.; Kinsey, R.J.; Durbin, S.M.; Markwitz, A.; Kennedy, V.J.; Asadov, A.; Gao, W.; Reeves, R.J. (2005)

    Journal article
    The University of Auckland Library

    An open access copy of this article is available and complies with the copyright holder/publisher conditions. Room-temperature ferromagnetic In1-x Crx N films with x ranging from 0. 0005 to 0.04 and antiferromagnetic CrN films have been grown by plasma-assisted molecular-beam epitaxy. Electron and x-ray-diffraction techniques could find no evidence for precipitates or phase segregation within the films. Ferromagnetism was observed in the In1-x Crx N layers over a wide range of Cr concentrations, with the magnitude of the ferromagnetism found to correlate with the background carrier concentration. Higher n -type carrier concentrations were found to lead enhanced ferromagnetism, with maximum saturation and remnant moments of 7 and 0.7 emu cm3, respectively. The addition of Cr to the InN matrix led to reduced photoluminescence intensity and a shift of the peak to higher energy. These observations along with a band-gap-like optical transmission feature at 0.7 eV suggest that CrN has an indirect gap of approximately 0.7 eV and a direct ? -valley gap greater than 1.2 eV.

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