Title :
Write head analysis by using a parallel micromagnetic FEM
Author :
Takano, Kenichi ; Salhi, El-Amine ; Sakai, Masanori ; Dovek, Moris
Author_Institution :
Headway Technol., Inc, Milpitas, CA, USA
Abstract :
We develop a parallel micromagnetic finite-element method (micromagnetic-FEM) to handle a large number of micromagnetic elements and utilize it to analyze full head and media models. When the calculation domain decomposition and the one-one node communication are applied, the program shows four times faster calculation in eight CPU operation, as compared with one CPU calculation. We study head field and media magnetization reversal on the frequency of 714 MHz, using different yoke length heads of 6, 10, and 15μm. The shorter yoke head shows faster head field reversal and stronger head field strength, and the recorded media magnetization is also larger. The small damping parameter of the head causes not only smaller head field but also the disorder of the media transition.
Keywords :
finite element analysis; magnetic fields; magnetic heads; magnetisation reversal; micromagnetics; CPU operation; domain decomposition; finite-element method; head field reversal; head field strength; magnetic heads; magnetization reversal; media magnetization; micromagnetic element; micromagnetic modeling; one-one node communication; parallel calculation; parallel micromagnetic FEM; write head analysis; yoke head; Concurrent computing; Delay effects; Finite element methods; Frequency; Magnetic analysis; Magnetic heads; Magnetic recording; Magnetization reversal; Matrix decomposition; Micromagnetics; Finite-element method (FEM); magnetic heads; micromagnetic modeling; parallel calculation;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2005.854742