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

Abstract

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.

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

References in corpus (6)

• Current driven magnetization dynamics in ferromagnetic nanowires with Dzyaloshinskii-Moriya interaction
• Mapping Monte Carlo to Langevin dynamics: A Fokker-Planck approach
• Minimization of Ohmic losses for domain wall motion in a ferromagnetic nanowire
• Time Quantified Monte Carlo Algorithm for Interacting Spin Array Micromagnetic Dynamics
• Effect of antiferromagnetic exchange interactions on the Glauber dynamics of one-dimensional Ising models
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Cited by in corpus (5)

• Finite-size effects on the dynamic susceptibility of CoPhOMe single-chain molecular magnets in presence of a static magnetic field
• A combined first-principles and thermodynamic approach to M-Nitronyl Nitroxide (M=Co, Mn) spin helices
• Magnetic Tetrastability in a Spin Chain
• Monte Carlo simulated dynamical magnetization of single-chain magnets
• Domain-wall free energy in Heisenberg ferromagnets