Static and dynamic properties of Single-Chain Magnets with sharp and broad domain walls

Details Static and dynamic properties of Single-Chain Magnets with sharp and broad domain walls Static and dynamic properties of Single-Chain Magnets with sharp and broad domain walls

2011-04-20

arxiv.org/abs/1104.4007v2

Phys. Rev. B 84, 064415 (2011)

Physics

Condensed Matter

Statistical Mechanics

18 pages, 13 figures, to be published in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.84.064415

We discuss time-quantified Monte-Carlo simulations on classical spin chains with uniaxial anisotropy in relation to static calculations. Depending on the thickness of domain walls, controlled by the relative strength of the exchange and magnetic anisotropy energy, we found two distinct regimes in which both the static and dynamic behavior are different. For broad domain walls, the interplay between localized excitations and spin waves turns out to be crucial at finite temperature. As a consequence, a different protocol should be followed in the experimental characterization of slow-relaxing spin chains with broad domain walls with respect to the usual Ising limit.

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