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首页> 外文期刊>IEEE Transactions on Magnetics >Reversal Time of Jump-Noise Dynamics for Large Nucleation
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Reversal Time of Jump-Noise Dynamics for Large Nucleation

机译：大成核的跳跃噪声动力学逆转时间

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摘要

The jump-noise is a phenomenological stochastic process used to model the thermal fluctuation of magnetization in nanomagnets. In this paper, the large nucleation regime of jump-noise dynamics is studied, and its reversal time is characterized from Monte Carlo simulations and analysis. Results show that the reversal time of jump-noise dynamics for large nucleation is asymptotically equal to the time constant associated with a single jump-noise scattering event from the energy minimum in the energy landscape of the magnetization. The reversal time for large nucleation depends linearly on the height of the energy barrier for large barriers. The significance of the large nucleation regime of jump-noise dynamics to phenomenologically explain the magnetoelectric switching of antiferromagnetic order parameter is also prospected.
机译：跳跃噪声是一种现象学上的随机过程，用于模拟纳米磁铁中磁化的热波动。本文研究了跳动动力学的大成核机制，并通过蒙特卡洛模拟和分析来表征其逆转时间。结果表明，从磁化能图中的最小能量出发，大成核现象的跳跃噪声动力学的逆转时间渐近等于与单个跳跃噪声散射事件相关的时间常数。大成核的逆转时间线性取决于大势垒的能垒高度。展望了跳跃噪声动力学的大成核机制对从现象学上解释反铁磁有序参数的磁电转换的意义。

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