High frequency magnetization reversal in rotating fields

Micromagnetic simulations of polycrystalline thin films predict that rotational magnetization processes are much more strongly affected by interactions and much less strongly affected by damping than 1-D switching processes. Interactions significantly affect the rotational hysteresis loss and reduce...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2001-07, Vol.37 (4), p.1366-1368
Main Authors: Miles, J.J., Middleton, B.K., Rea, C.J.
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Damping
Exact sciences and technology
Frequency
High frequencies
Hysteresis
Magnetic properties and materials
Magnetic properties of monolayers and thin films
Magnetic properties of surface, thin films and multilayers
Magnetic switching
Magnetism
Magnetization
Magnetization processes
Magnetization reversal
Micromagnetics
Perpendicular magnetic recording
Physics
Predictive models
Recording
Rotating
Rotational
Switching
Thin films
Transistors
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Summary:Micromagnetic simulations of polycrystalline thin films predict that rotational magnetization processes are much more strongly affected by interactions and much less strongly affected by damping than 1-D switching processes. Interactions significantly affect the rotational hysteresis loss and reduce the magnitude of the field required for reversal. Reversal in rotating fields is predicted to occur at frequencies up to an order of magnitude higher than in 1-D switching fields. Track edge erasure in longitudinal recording is therefore predicted to persist to higher frequencies than the recorded signal, and we suggest that perpendicular recording may be possible at higher frequencies and with higher anisotropy materials than longitudinal recording.
ISSN:0018-9464
1941-0069
DOI:10.1109/20.950843