Synthetic antiferromagnet for hard layer of exchange coupled composite media

Stephanie Hernandez; Manish Kapoor; R. H. Victora

doi:10.1063/1.2716860

Synthetic antiferromagnet for hard layer of exchange coupled composite media

Stephanie Hernandez, Manish Kapoor, R. H. Victora

Electrical and Computer Engineering

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

16 Scopus citations

Abstract

It has been shown that exchange coupled composite (ECC) media exhibit a superior thermal stability to switching field ratio compared to conventional perpendicular media. However, optimal media designs have employed a low magnetization hard layer. A more physically achievable design may consist of replacing the hard layer with a synthetic antiferromagnet consisting of two ferromagnetic hard layers coupled by an antiferromagnetic exchange interaction. This approach is shown to decrease the switching field and increases the thermal stability ratio when compared to ECC media with a single hard layer.

Original language	English (US)
Article number	132505
Journal	Applied Physics Letters
Volume	90
Issue number	13
DOIs	https://doi.org/10.1063/1.2716860
State	Published - 2007

Bibliographical note

Funding Information:
This work was supported in part by the IGERT Program of the National Science Foundation under Award No. DGE-0114372 and the INSIC EHDR program.

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10.1063/1.2716860

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N2 - It has been shown that exchange coupled composite (ECC) media exhibit a superior thermal stability to switching field ratio compared to conventional perpendicular media. However, optimal media designs have employed a low magnetization hard layer. A more physically achievable design may consist of replacing the hard layer with a synthetic antiferromagnet consisting of two ferromagnetic hard layers coupled by an antiferromagnetic exchange interaction. This approach is shown to decrease the switching field and increases the thermal stability ratio when compared to ECC media with a single hard layer.

AB - It has been shown that exchange coupled composite (ECC) media exhibit a superior thermal stability to switching field ratio compared to conventional perpendicular media. However, optimal media designs have employed a low magnetization hard layer. A more physically achievable design may consist of replacing the hard layer with a synthetic antiferromagnet consisting of two ferromagnetic hard layers coupled by an antiferromagnetic exchange interaction. This approach is shown to decrease the switching field and increases the thermal stability ratio when compared to ECC media with a single hard layer.

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Synthetic antiferromagnet for hard layer of exchange coupled composite media

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