Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/10362
Title: Oxygen-stoichiometry-dependent microstructural and magnetic properties of CoPt thin films capped with ion-beam-assisted deposited TiOx layers
Authors: Li, G
Leung, CW 
Shueh, C
Wu, YJ
Lin, KW
Sun, AC
Hsu, JH
Lai, PT
Pong, PWT
Issue Date: 2013
Source: Surface and coatings technology, 2013, v. 228, p. s354-s359
Abstract: The magnetic properties of CoPt with different percentages of oxygen in the TiOx capping layer were investigated through annealing processes. Results have shown that after annealing, the structural phase transformation from fcc to fct CoPt occurred and was confirmed by the enhanced coercivities. In addition, the isolated CoPt grains separated by grain boundary TiOx in the annealed CoPt/TiOx (30% O-2/Ar) thin films exhibited the largest coercivity. The excess amount of oxygen in the TiOx layer may react with Co and Pt to form oxides (as characterized by XPS) and result in the drop of coercivity. Thus the growth of the fct CoPt phase can be enhanced by optimizing the oxygen ratio during fabrication of the TiOx layer and post annealing, which may find useful applications for future CoPt-based magnetic recording.
Keywords: Magnetic thin films
CoPt
Ion-beam assisted deposition
Publisher: Elsevier
Journal: Surface and coatings technology 
ISSN: 0257-8972
EISSN: 1879-3347
DOI: 10.1016/j.surfcoat.2012.05.103
Description: 8th Asian-European International Conference on Plasma Surface Engineering (AEPSE), Dalian, Peoples R China, 19-22 September 2011
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