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Effect of Grain Size and Magnetic Switching Volume on Media Noise Due to Intergranular Coupling in CoCrTaPt/Cr Thin Film Media

Published online by Cambridge University Press:  10 February 2011

Sudhir S. Malhotra ,
Brij B. Lal  and
Michael A. Russak
Sudhir S. Malhotra
Affiliation:
HMT Technology, Fremont, CA 94538
Brij B. Lal
Affiliation:
HMT Technology, Fremont, CA 94538
Michael A. Russak
Affiliation:
HMT Technology, Fremont, CA 94538
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Abstract

In this work the effect of grain size and magnetic switching volume on media noise due to intergranular coupling for CoCrTaPt/Cr thin film media deposited at substrate temperature of 160 and 260°C are investigated. The film deposited at substrate temperature of 260°C showed weaker intergranular interaction and lower media noise compared to the film deposited at 160°C. The magnetic switching volume (V*) is an important consideration for thermal stability and media noise in high density recording media. The magnetic switching volume V* for the film deposited at 160 and 260°C was calculated to be 3.7 x 10-18 and 3.2 x 10-18 cm3 respectively. The magnetic switching volume is correlated to the average Co-alloy grain size, media noise and the interactions between the grains.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 517: Symposium F – Wide Bandgap Semiconductors for High Power, High Frequency , January 1998 , 267
Copyright
Copyright © Materials Research Society 1998

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