Antiferromagnetically coupled patterned media

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

Research output: Contribution to journalArticle

33 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

    Fingerprint

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this