Abstract
In recent years, static and dynamic properties of non- domain walls in magnetic materials have attracted a great deal of interest. In this paper, spin-reorientation critical dynamics in the two-dimensional model is investigated with Monte Carlo simulations and theoretical analyses based on the Langevin equation. At the Kosterlitz-Thouless phase transition, the dynamic scaling behaviors of the magnetization and the two-time correlation function are carefully analyzed, and critical exponents are accurately determined. When the initial value of the angle between adjacent domains is slightly lower than , a critical exponent is introduced to characterize the abnormal power-law increase of the magnetization in the horizontal direction inside the domain interface, which is measured to be . In addition, the relation is analytically deduced from the Langevin dynamics in the long-wavelength approximation, well consistent with numerical results.
- Received 22 November 2018
DOI:https://doi.org/10.1103/PhysRevE.99.022129
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