Memory effects and slow dynamics in ultra thin magnetic films |
| |
| Institution: | 2. Department of Neurosciences and Behavioural Sciences, Hospital das Clínicas—Medical School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil;1. School of Biological Sciences, University of the Punjab, Lahore 54590, Pakistan;2. Atta-Ur-Rahman School of Applied Biosciences, National University of Sciences and Technology, Islamabad 44000, Pakistan;3. Department of Pathology and Laboratory Medicine, University of California, Davis 95616, USA |
| |
| Abstract: | Monte Carlo studies of a uniaxial spin system on a square lattice with both ferromagnetic exchange interactions and dipolar interactions reveal three distinct dynamical regimes at low temperatures. In the first regime the magnetization decays through nucleation and growth of spin islands, in the second regime, despite the magnetization being effectively zero, there is a persistent memory effect most clearly revealed by the asymmetry between the numbers of up and down islands. The third regime is characterized by slow crystallization of the equilibrium smectic phase from the quenched polycrystalline state. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
