Micromagnetic recording model of pole-tip saturation effects

Auxiliary write-head fields, either from simple analytic approximations or from finite-element computations, are used to record transitions on a Landau-Lifschitz-Gilbert model of thin-film recording media. A micromagnetic model of a magnetoresistive element is used to read back the transitions. Focu...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on magnetics 2000-11, Vol.36 (6), p.3975-3983
Main Authors: van Ek, J., Plumer, M., Hong Zhou, Bertram, H.N.
Format: Article
Language:English
Subjects:
Applied sciences
Approximation
Degradation
Electronics
Exact sciences and technology
Exact solutions
Ferrites
Finite element methods
Giant magnetoresistance
Magnetic analysis
Magnetic devices
Magnetic heads
Magnetic recording
Magnetic storage
Magnetic thin film devices: magnetic heads (magnetoresistive, inductive, etc.)
domain-motion devices, etc
Magnetism
Mathematical analysis
Mathematical models
Micromagnetics
Playbacks
Recording
Saturation
Saturation magnetization
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Transistors
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Auxiliary write-head fields, either from simple analytic approximations or from finite-element computations, are used to record transitions on a Landau-Lifschitz-Gilbert model of thin-film recording media. A micromagnetic model of a magnetoresistive element is used to read back the transitions. Focus is on the impact of pole-tip saturation on the quality of the recorded track and subsequent playback. It is shown that with increasing write current, the quality of the recorded transitions degrades much more rapidly than would be expected from the analytical expressions for the write-head field. Specifically, head saturation causes the transition parameter to increase. At high write currents, poor write field gradients at the track edges result in a strong increase in transition parameter with read width percentage of the recorded track.
ISSN:0018-9464
1941-0069
DOI:10.1109/20.914350