Behavior of μMAG standard problem No. 2 in the small particle limit

M. J. Donahue, D. G. Porter, R. D. McMichael, J. Eicke
2000 Journal of Applied Physics  
For a uniformly magnetized rectangular particle with dimensions in the ratio 5 : 1 : 0.1, the coercive and switching fields in the (1,1,1) direction are determined to be H c /M s ϭ0.057069478 and H s /M s ϭ0.057142805. Previous micromagnetic computations of coercive and switching fields that did not approach these values for small particles are analyzed. It is shown that the disagreement was primarily due to a disparity in the method of calculating demagnetization energy. Corrected simulations
more » ... rected simulations are shown to agree with analytically determined values.
doi:10.1063/1.373391 fatcat:sgujyoa2qbgirkamfxuprc4jka