Optical and magnetic properties of ZnO bulk crystals implanted with Cr and Fe

Optical absorption and microcathodoluminescence (MCL) bands were studied in heavily Cr and Fe implanted ZnO bulk crystals annealed at 700°C. The samples showed at room temperature hysteresis. The implanted regions remained n-type and optical absorption bands near 1.8 eV and the MCL bands near 2.8 eV...

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Bibliographic Details
Published in:Materials science in semiconductor processing 2004-02, Vol.7 (1), p.77-81
Main Authors: Polyakov, A.Y., Govorkov, A.V., Smirnov, N.B., Pashkova, N.V., Pearton, S.J., Ip, K., Frazier, R.M., Abernathy, C.R., Norton, D.P., Zavada, J.M., Wilson, R.G.
Format: Article
Language:English
Subjects:
Ion
Magnetism
ZnO
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Summary:Optical absorption and microcathodoluminescence (MCL) bands were studied in heavily Cr and Fe implanted ZnO bulk crystals annealed at 700°C. The samples showed at room temperature hysteresis. The implanted regions remained n-type and optical absorption bands near 1.8 eV and the MCL bands near 2.8 eV were found to be associated with the transition metal (TM) ions. These bands are tentatively attributed to internal transitions between the levels of the substitutional TM ions. In addition to those bands we also observed strong absorption bands at 0.5 and 2.4 eV and MCL bands near 1.9 and 2.3 eV. All these bands are related to radiation damage defects.
ISSN:1369-8001
1873-4081
DOI:10.1016/j.mssp.2004.03.001