OFF-AXIAL DYNAMIC SYMMETRY BREAKING IN UNIAXIALLY ANISOTROPIC HEISENBERG FERROMAGNET

Muktish Acharyya ()
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Muktish Acharyya: Department of Physics, Krishnanagar Government College, P.O.-Krishnanagar, PIN-741101, Dist.-Nadia, West-Bengal, India

International Journal of Modern Physics C (IJMPC), 2001, vol. 12, issue 05, 709-716

Abstract: The dynamics of uniaxially (along thezdirection) anisotropic Heisenberg ferromagnets (in three dimensions) in the presence of a magnetic field varying sinusoidally in time (along thex-direction only) is studied by Monte Carlo method using Metropolis rate. The time averaged (over a complete cycle of the oscillating field) value ofzcomponent of the magnetization continuously vanishes at a particular transition temperature associated with a dynamic symmetry breaking ofmz-hxloop. The temperature variation of dynamic order parameter and the dynamic specific heat for different values of the anisotropy show that the transition temperature increases as the strength of anisotropy increases.

Keywords: Heisenberg Model; Uniaxial Anisotropy; Monte Carlo Simulation; Dynamical Phase Transition (search for similar items in EconPapers)
Date: 2001
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DOI: 10.1142/S0129183101001870

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