Slow magnetization relaxation and reversal in magnetic thin films

Abstract

The slow magnetization dynamics in magnetic thin films has been investigated in this paper. It is shown that the experimental results of the time-dependent magnetization can be well described by the extended exponential function, exp(−(t/τ)β) with β>0, in a number of thin film systems. By investigating the characteristics of the magnetization process and examining the limitations of the present models, an explanation is provided based on the structural and dynamical properties of the magnetic domains. Meanwhile, some questions have been clarified in the study towards understanding the magnetization relaxation phenomenon in thin films.