Antiferromagnetically coupled patterned media

S. N. Piramanayagam, K. O. Aung, S. Deng, R. Sbiaa

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

Magnetostatic interactions in patterned media are responsible for increasing the switching field distribution and reducing the thermal stability. Micromagnetic simulations indicate that a reduced saturation magnetization (Ms) and increased anisotropy constant (Ku) lead to better thermal stability. However, writability will be a concern with this approach. Patterned media with an antiferromagnetically coupled (AFC) recording media structure is studied to obtain high thermal stability even with a larger Ms and larger Ku. With the AFC structure, the reduced remanence magnetization (Mr) leads to a reduced magnetostatic interaction, even though the Ms is larger. Magnetic force microscopy measurements indicate that the AFC media show a narrower switching field distribution.

Original languageEnglish
Article number07C118
JournalJournal of Applied Physics
Volume105
Issue number7
DOIs
Publication statusPublished - 2009

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thermal stability
magnetostatics
magnetization
magnetic force microscopy
remanence
recording
interactions
saturation
anisotropy
simulation

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Antiferromagnetically coupled patterned media. / Piramanayagam, S. N.; Aung, K. O.; Deng, S.; Sbiaa, R.

In: Journal of Applied Physics, Vol. 105, No. 7, 07C118, 2009.

Research output: Contribution to journalArticle

Piramanayagam, S. N. ; Aung, K. O. ; Deng, S. ; Sbiaa, R. / Antiferromagnetically coupled patterned media. In: Journal of Applied Physics. 2009 ; Vol. 105, No. 7.
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