Effect of Thicknesses on the Microstructure and Magnetic Properties of CoPt Thin Films

Abstract:

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The microstructures and magnetic properties of CoPt thin films with thicknesses between 1 and 20 nm deposited on amorphous glass substrate and post-annealing at 600°C for 30 min were investigated. The morphology of CoPt thin film would change from a discontinuous nano-size CoPt islands into a continuous film gradually as the film thickness was increased from 1 to 20 nm. The formation mechanism of the CoPt islands may be due to the surface energy difference between the glass substrate and CoPt alloy. Each CoPt island could be a single domain particle. This discontinuous nano-island CoPt recording film may increase the recording density and enhance the signal to noise ratio while comparing with the continuous film. The as-deposited 5 nm CoPt film revealed the separated islands morphology after annealing at 600°C for 30 min. This nano-size CoPt thin film may be a candidate for ultra-high density magnetic recording media due to its discontinuous islanded nanostructure.

Info:

Periodical:

Advanced Materials Research (Volumes 123-125)

Edited by:

Joong Hee Lee

Pages:

655-658

DOI:

10.4028/www.scientific.net/AMR.123-125.655

Citation:

C. L. Shen et al., "Effect of Thicknesses on the Microstructure and Magnetic Properties of CoPt Thin Films", Advanced Materials Research, Vols. 123-125, pp. 655-658, 2010

Online since:

August 2010

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Price:

$35.00

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