Micromagnetic calculations of eddy currents with time-varying fields

This paper extends a recently presented program for solving the eddy current problem in a cylindrical geometry, by investigating the effect of time-varying fields. When the applied field is turned off, wall motion slows by several orders of magnitude, but since the wall energy can be reduced by redu...

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 2006-02, Vol.372 (1-2), p.290-293
Main Authors: YANIK, Levent, DELLA TORRE, Edward, DONAHUE, Michael J
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Critical-point effects, specific heats, short-range order
Domain effects, magnetization curves, and hysteresis
Domain walls and domain structure
Exact sciences and technology
Magnetic properties and materials
Numerical simulation studies
Physics
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Summary:This paper extends a recently presented program for solving the eddy current problem in a cylindrical geometry, by investigating the effect of time-varying fields. When the applied field is turned off, wall motion slows by several orders of magnitude, but since the wall energy can be reduced by reducing the length of the wall, it continues to move, albeit much more slowly. Reversing the applied field has the effect of nucleating the opposite kind of wall which propagates inward and eventually annihilates the previous wall.
ISSN:0921-4526
1873-2135
DOI:10.1016/j.physb.2005.10.069