期刊
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
卷 304, 期 1, 页码 75-78出版社
ELSEVIER
DOI: 10.1016/j.jmmm.2006.02.111
关键词
magnetic semiconductors; double exchange; spintronic
In this paper we study the room temperature ferromagnetism reported on Mn-doped ZnO and ascribed to spin polarization of conduction electrons. We experimentally show that the ferromagnetic behaviour is associated to the coexistence of Mn3+ and Mn+4 in MnO2 grains where diffusion of Zn promotes the Mn4+ --> Mn3+ reduction. Potential uses of this material in spintronic devices are analysed. (C) 2006 Elsevier B.V. All rights reserved.
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