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Title: Inducing ferromagnetism in ZnO through doping of nonmagnetic elements
Authors: Ma, Y.W.
Yi, J.B. 
Ding, J. 
Van, L.H. 
Zhang, H.T. 
Ng, C.M.
Issue Date: 2008
Citation: Ma, Y.W., Yi, J.B., Ding, J., Van, L.H., Zhang, H.T., Ng, C.M. (2008). Inducing ferromagnetism in ZnO through doping of nonmagnetic elements. Applied Physics Letters 93 (4) : -. ScholarBank@NUS Repository.
Abstract: In this work, Zn, Al, Pt, Ag, and Au nonmagnetic metallic films were deposited on the surface of ZnO film, followed by high vacuum annealing at different temperatures. Results showed that (Zn,Al,Pt) ZnO films possessed room temperature ferromagnetism (RTF) after the vacuum annealing, while (Ag,Au) ZnO films did not. Our detailed structural investigations (transmission electron microscopy and x-ray photoelectron spectroscopy) revealed that this RTF was associated with the presence of metal clusters. The RTF disappeared in AlZnO after a subsequent annealing in air, as metal clusters were oxidized. PtZnO remained ferromagnetic, as the metal cluster structure was stable subjected to the air annealing. © 2008 American Institute of Physics.
Source Title: Applied Physics Letters
ISSN: 00036951
DOI: 10.1063/1.2966360
Appears in Collections:Staff Publications

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