Anti-ferromagnetic coupling effects on energy barrier and reversal properties of recording media

J. P. Wang, Z. S. Shan, S. N. Piramanayagam, T. C. Chong

Research output: Contribution to journalConference articlepeer-review

31 Scopus citations

Abstract

Analytical solutions for coercivity HCM1, HCM2, effective (Mrt)eff, energy-harrier and effective thermal stability factor as a function of coupling constant J and other film parameters have been derived for two coupled ferromagnetic layers (FM-FM layer) with different magnetic properties for the first time. The condition for reduced effective (Mrt)eff is analyzed. These results are valuable for laminated antiferromagnetically coupled media design. This may open up a channel to raise thermal stability significantly while maintaining lower noise for longitudinal recording media.

Original languageEnglish (US)
Pages (from-to)1445-1448
Number of pages4
JournalIEEE Transactions on Magnetics
Volume37
Issue number4 I
DOIs
StatePublished - Jul 1 2001
Event8th Joint Magnetism and Magnetic Materials -International Magnetic Conference- (MMM-Intermag) - San Antonio, TX, United States
Duration: Jan 7 2001Jan 11 2001

Keywords

  • Antiferromagnetically coupled film
  • Energy barrier
  • Magnetic recording media
  • Thermal stability

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