Journal
AIP ADVANCES
Volume 2, Issue 1, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3698314
Keywords
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Funding
- National Natural Science Foundation of China [51002176]
- Shanghai Institute of Ceramics
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This paper reports the origin of ferromagnetism in Cu-doped ZnO thin films. Room-temperature ferromagnetism is obtained in all the thin films when deposited at different oxygen partial pressure. An obviously enhanced peak corresponding to zinc vacancy is observed in the photoluminescence spectra, while the electrical spin resonance measurement implies the zinc vacancy is negative charged. After excluding the possibility of direct exchange mechanisms (via free carriers), we tentatively propose a quasi-indirect exchange model (via ionized zinc vacancy) for Cu-doped ZnO system. Copyright 2012 Author(s). This article is distributed under a Creative Commons Attribution 3.0 Unported License. [http://dx.doi.org/10.1063/1.3698314]
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