Equiatomic CoPt thin films with extremely high coercivity

Equiatomic CoPt thin films with extremely high coercivity
Title:
Equiatomic CoPt thin films with extremely high coercivity
Other Titles:
Journal of Applied Physics
DOI:
10.1063/1.4861213
Publication Date:
17 May 2014
Citation:
Abstract:
In this paper, magnetic and structural properties of near-equiatomic CoPt thin films, which exhibited a high coercivity in the film-normal direction—suitable for perpendicular magnetic recording media applications—are reported. The films exhibited a larger coercivity of about 6.5 kOe at 8 nm. The coercivity showed a monotonous decrease as the film thickness was increased. The transmission electron microscopy images indicated that the as fabricated CoPt film generally consists of a stack of magnetically hard hexagonal-close-packed phase, followed by stacking faults and face-centred-cubic phase. The thickness dependent magnetic properties are explained on the basis of exchange-coupled composite media. Epitaxial growth on Ru layers is a possible factor leading to the unusual observation of magnetically hard hcp-phase at high concentrations of Pt.
License type:
PublisherCopyrights
Funding Info:
Description:
ISSN:
0003-6951
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