Title: Initial layer in FePt perpendicular media with different buffer layers

Authors: B.C. Lim, J.S. Chen, G.M. Chow

Addresses: Data Storage Institute, A^*STAR (Agency for Science, Technology and Research), 117608, Singapore. ' Department of Materials Science and Engineering, National University of Singapore, 117574 Singapore. ' Department of Materials Science and Engineering, National University of Singapore, 117574 Singapore

Abstract: The initial layer of FePt media on CuRu underlayer with different buffer layer was investigated. FePt film showed isotropic magnetisation behaviour when deposited directly on CrRu underlayer. With a 4 nm Pt buffer layer, even 3 nm thick FePt film possessed dominant out-of-plane anisotropy. It was found that the initial growth layer thickness (t_initial) in FePt was reduced from 1.4 nm to 0.8 nm with the Pt buffer layer. With MgO as buffer layer the t_initial was further reduced to 0.6 nm.

Keywords: FePt; iron platinum; perpendicular media; initial growth layer; buffer layers; copper ruthenium; CuRu underlayer.

DOI: 10.1504/IJSURFSE.2009.024364

International Journal of Surface Science and Engineering, 2009 Vol.3 No.1/2, pp.103 - 113

Published online: 01 Apr 2009 *

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