Title :
A higher order FEM-BEM method for the calculation of domain processes in magnetic nano-elements
Author :
Schrefl, Thomas ; Fidler, Josef ; Kirk, Katherine J. ; Chapman, John N.
Author_Institution :
Inst. of Appl. & Tech. Phys., Wien Univ. of Technol., Austria
fDate :
9/1/1997 12:00:00 AM
Abstract :
The Gilbert equation of motion is solved for magnetic nano-elements of arbitrary shape using a hybrid finite element/boundary element method. NiFe elements show small scale domains in the remanent state, if a uniaxial anisotropy parallel to the short axis is assumed. In bars with one pointed end, the formation of the domains starts from the flat ends. Narrow elements with a width smaller than 0.2 μm remain in a nearly single domain state
Keywords :
boundary-elements methods; ferromagnetic materials; finite element analysis; iron alloys; magnetic anisotropy; magnetic domains; nanotechnology; nickel alloys; remanence; 0.1 to 0.2 mum; Gilbert equation of motion; NiFe; NiFe elements; arbitrary shape; domain formation; domain processes; higher order FEM-BEM method; magnetic bars; magnetic nano-elements; micromagnetic simulation; nearly single domain state; remanent state; uniaxial anisotropy; Demagnetization; Differential equations; Finite element methods; Integral equations; Interpolation; Magnetic domains; Magnetostatics; Poisson equations; Polarization; Testing;
Journal_Title :
Magnetics, IEEE Transactions on
