Abstract
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.
Lingua originale | English |
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pagine (da-a) | 100606-100612 |
Numero di pagine | 7 |
Rivista | J. Phys.: Condens. Matter |
Volume | 2013 |
DOI | |
Stato di pubblicazione | Pubblicato - 2013 |
Keywords
- long range interacting systems
- magnetic reversal