Title :
Micromagnetic simulation of the pinning and depinning process in permanent magnets
Author :
Scholz, Werner ; Schrefl, Thomas ; Fidler, Josef ; Matthias, Thorsten ; Suess, Dieter ; Tsiantos, Vassilios
Author_Institution :
Inst. of Solid State Phys., Vienna Univ. of Technol., Austria
Abstract :
We have studied the pinning of magnetic domain walls on a simplified model of the cell structure of Sm(Co,Fe,Cu,Zr)z precipitation hardened magnets. The pinning field strongly depends on the thickness of the intercellular phase if it is smaller than the domain wall width. Its maximum value has been verified with a one-dimensional analytical model. The cell structure plays an important role in the depinning process and it has been found that the pinning field depends linearly on the relative thickness of the intercellular phase. This behavior is universal for attractive and repulsive pinning.
Keywords :
cobalt alloys; copper alloys; demagnetisation; ferromagnetic materials; finite element analysis; iron alloys; magnetic domain walls; micromagnetics; permanent magnets; precipitation hardening; samarium alloys; zirconium alloys; Sm(Co,Fe,Cu,Zr)z precipitation hardened magnets; Sm-Co-Fe-Cu-Zr; attractive pinning; cell structure; demagnetization field; depinning process; domain wall width; finite-element method; intercellular phase thickness; magnetic domain wall pinning; micromagnetic simulation; micromagnetics; one-dimensional analytical model; permanent magnets; pinning field; repulsive pinning; Analytical models; Anisotropic magnetoresistance; Coercive force; Demagnetization; Finite element methods; Magnetic domain walls; Magnetic materials; Micromagnetics; Permanent magnets; Zirconium;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2003.815747
