Enhancement of the magnetic anisotropy barrier in critical long range spin systems.

  title={Enhancement of the magnetic anisotropy barrier in critical long range spin systems.},
  author={F. Borgonovi and G. Luca Celardo},
  journal={Journal of physics. Condensed matter : an Institute of Physics journal},
  volume={25 10},
  • F. Borgonovi, G. Celardo
  • Published 1 June 2011
  • Physics, Medicine
  • Journal of physics. Condensed matter : an Institute of Physics journal
Magnetic materials are usually characterized by anisotropy energy barriers which dictate the timescale of the magnetization decay and consequently the magnetic stability of the sample. Here we consider magnetization decay for spin systems in a d = 3 cubic lattice with an isotropic Heisenberg interaction decaying as a power law with a critical exponent α = d and on-site anisotropy. We show that the anisotropy energy barrier can be determined from the ergodicity breaking energy of the… 
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