Ultrafast Spin Dynamics: The Effect of Colored Noise
- 3 February 2009
- journal article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 102 (5), 057203
- https://doi.org/10.1103/physrevlett.102.057203
Abstract
Recent experimental results have pushed the limits of magnetization dynamics to pico- and femtosecond time scales. This ultrafast dynamics occurs in extreme conditions of strong and rapid fields and high temperatures. This situation requires a new description of magnetization dynamics, taking into account that the electron correlation time could be of the order of the inverse spin frequency. For this case we introduce a thermodynamically correct phenomenological Landau-Lifshitz-Miyasaki-Seki approach. We demonstrate the effect of the noise correlation time on the ultrafast demagnetization rate.Keywords
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