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arXiv 1210.4036cond-mat.mes-hallcond-mat.stat-mech
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自旋电流对随机磁化动力学的最优控制

Optimal Control of Stochastic Magnetization Dynamics by Spin Current

Yong Wang, Fu-Chun Zhang

摘要:

涨落诱导的随机磁化动力学在磁纪录和磁写入中起着重要的作用。在这里,我们提出的磁化动力学可以最佳控制的自旋电流,以最小化或最大化的Freidlin-Wentzell作用泛函的系统,从而增加或减少罕见事件的发生概率。我们应用这种方法来研究热驱动磁化开关问题,并证明了最优控制策略的优势。

英文摘要:

Fluctuation-induced stochastic magnetization dynamics plays an important role in magnetic recording and writing. Here we propose that the magnetization dynamics can be optimally controlled by the spin current to minimize or maximize the Freidlin-Wentzell action functional of the system hence to increase or decrease the happening probability of the rare event. We apply this method to study thermal-driven magnetization switching problem and to demonstrate the advantage of the optimal control strategy.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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