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Title: Room temperature ferromagnetism and hopping conduction in Pt NCs/Al 2O3 films
Authors: Ma, Y.W.
Ding, J. 
Yi, J.B. 
Chan, L.
Herng, T.S. 
Huang, S.
Ran, M. 
Issue Date: 1-Apr-2011
Citation: Ma, Y.W., Ding, J., Yi, J.B., Chan, L., Herng, T.S., Huang, S., Ran, M. (2011-04-01). Room temperature ferromagnetism and hopping conduction in Pt NCs/Al 2O3 films. Journal of Applied Physics 109 (7) : -. ScholarBank@NUS Repository.
Abstract: In this work, Pt nanocrystals (NCs) were embedded into different oxide films by codeposition of Pt and oxide at 400 C and 10-8 Torr using a pulse laser deposition system. Films of Pt (25 mol. ) NCs embedded in (Al 2O3, ZnO, or SnO2) matrix showed room temperature ferromagnetism (RTFM), while Pt (25 mol. ) NCs/(MgO or SiO 2) films were not magnetic. The detailed study of Pt NCs/Al 2O3 films with different concentrations of Pt revealed that RTFM depended on Pt NC size and conductivity of the film. Resistance-temperature study of this film showed that the hopping conduction may be associated with RTFM. © 2011 American Institute of Physics.
Source Title: Journal of Applied Physics
ISSN: 00218979
DOI: 10.1063/1.3562872
Appears in Collections:Staff Publications

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