Composite media for perpendicular magnetic recording

R. H. Victora; Xiao Shen

doi:10.1109/TMAG.2004.838075

Composite media for perpendicular magnetic recording

R. H. Victora, Xiao Shen

Electrical and Computer Engineering

Research output: Contribution to journal › Article › peer-review

457 Scopus citations

Abstract

A composite perpendicular recording media consisting of magnetically hard and soft regions within each grain is proposed. Application of applied field initially causes the magnetization of the soft region to rotate and, thus, change the angle of the effective field applied to the hard region. This important change in the effective field is enabled by an exchange layer that moderates the interaction between the two regions. Energy arguments show that the resulting performance (as measured by the ratio of energy barrier to switching field) is similar to the previously proposed tilted media, while avoiding some of the difficulties. In particular, fabrication of the proposed composite media appears to be significantly easier than that of tilted media.

Original language	English (US)
Pages (from-to)	537-542
Number of pages	6
Journal	IEEE Transactions on Magnetics
Volume	41
Issue number	2
DOIs	https://doi.org/10.1109/TMAG.2004.838075
State	Published - Feb 2005

Bibliographical note

Funding Information:
Manuscript received June 14, 2004; revised August 17, 2004. This work was supported in part by the National Science Foundation under Grant ECS-0300209 and in part by the Information Storage Industry Consortium (INSIC) EHDR program.

Keywords

Exchange coupled composite media
Perpendicular magnetic recording
Thermal fluctuations

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10.1109/TMAG.2004.838075

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KW - Thermal fluctuations

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Composite media for perpendicular magnetic recording

Abstract

Bibliographical note

Keywords

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