NDLI: Effect of Intergranular Exchange on the Thermal Stability and Coercive Field of Perpendicular, Single Phase, Exchange Spring, and Coupled Granular Continuous (CGC) Perpendicular Recording Media

Content Provider	IEEE Xplore Digital Library
Author	Suess, D. Lee, J. Fidler, J. Jung, H.S. Velu, E.M.T. Jiang, W. Malhotra, S.S. Bertero, G. Schrefl, T.
Copyright Year	1965
Abstract	We performed micromagnetic simulations in order to investigate the effect of intergranular exchange coupling on the magnetic properties of advanced magnetic recording structures. We found that the coercive field of granular recording media decreases with increasing intergrain exchange coupling (A _int). We observed this decay even for perfect films without switching field distributions and soft magnetic inclusions. A mean field exchange field of about mu₀ H _ex = 0.34 T leads to the same thermal stability of the grains at the transition and in the center of a bit. A larger value of A _int lowers the thermal stability of the grains close to the transitions. Micromagnetic simulations of coupled granular continuous (CGC) media indicate that the top layer in CGC media is not continuous. The simulations suggest that the top layer is granular with a relatively weak intergrain exchange coupling, A _int.
Sponsorship	IEEE Magnetics Society
Starting Page	88
Ending Page	99
Page Count	12
File Size	1204748
File Format	PDF
ISSN	00189464
Volume Number	45
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Thermal stability Springs Perpendicular magnetic recording Micromagnetics Couplings Magnetic properties Magnetic recording Magnetic films Magnetic switching Soft magnetic materials thermal stability CGC continuous coupled granular dual layer exchange spring media intergrain exchange
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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