Journal
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
Volume 7, Issue 1-2, Pages 77-81Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.mssp.2004.03.001
Keywords
ZnO; magnetism; ion
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Optical absorption and microcathodoluminescence (MCL) bands were studied in heavily Cr and Fe implanted ZnO bulk crystals annealed at 700degreesC. 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. (C) 2004 Elsevier Ltd. All rights reserved.
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