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G. Hrkac, T. Schrefl, M. Schabes:
"A combined vector and scalar potential method for 3D magnetic fields and transient Eddy current effects in recording head coils";
Physica B: Condensed Matter, 384 (2006), S. 253 - 255.

A combined vector and scalar potential method for 3D magnetic fields and transient Eddy current effects in recording head coils

G. Hrkac a, T. Schrefl a and M. Schabes b

a Department of Engineering Materials, University of Sheffield, Western Bank, Sheffield, UK
b Hitachi San Jose Research Center, Hitachi Global Storage Technologies, San Jose, CA 95193, USA

Abstract

A mixed 3D finite element vector and scalar potential method was developed to treat inhomogeneities in coils of recording heads. It is assumed that in the yoke of the recording head the change of magnetization, generates a magnetic field that leads to Eddy current effects in the coil. The problem is separated into two regions, a conducting (the coil) and in a non-conducting one. For the conducting region we solve a vector potential diffusion equation with all contributing currents as a source term, including the Eddy currents produced by the yoke and for the non-conducting region a scalar potential partial differential equation is solved. To combine the vector and the scalar potential method special boundary conditions are implemented. The combined system of partial differential equations are solved simultaneously with a finite element/boundary element method.

http://aleph.ub.tuwien.ac.at/F?base=tuw01&func=find-c&ccl_term=AC06588242

http://dx.doi.org/10.1016/j.physb.2006.06.066