Noise reduction mechanisms in laminated antiferromagnetically coupled recording media

S. N. Piramanayagam, J. P. Wang, C. H. Hee, S. I. Pang, T. C. Chong, Z. S. Shan, L. Huang

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

Experimental methods to obtain remnant moment-thickness product (Mrδ) reduction in the laminated antiferromagnetically coupled (LAC) recording media is described. The results indicate that the reduction in Mrδ (or, indirectly, a reduction in noise) can be obtained by altering the antiferromagnetic coupling constant J, or by the parameters of the underlayer such as anisotropy constant (Ku2), thickness (t2), etc. A method to enhance J by intrinsic means is proposed by which a high exchange field of about 1900 Oe can be obtained. Thermal energy has been found to help in obtaining a Mrδ reduction in LAC media. Substrates with lower surface roughness also enhance the Mrδ reduction.

Original languageEnglish (US)
Pages (from-to)2423-2425
Number of pages3
JournalApplied Physics Letters
Volume79
Issue number15
DOIs
StatePublished - Oct 8 2001

Bibliographical note

Copyright:
Copyright 2004 Elsevier Science B.V., Amsterdam. All rights reserved.

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