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

Fausto Borgonovi, G. L. Celardo, Giuseppe Celardo

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


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 corresponding isolated system and that, unlike in the case of nearest neighbour interaction, the anisotropy energy barrier grows as the particle volume, V, and not as the cross-sectional area.
Original languageEnglish
Pages (from-to)100606-100612
Number of pages7
JournalJ. Phys.: Condens. Matter
Publication statusPublished - 2013


  • long range interacting systems
  • magnetic reversal


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