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arXiv 0810.4286cond-mat.supr-concond-mat.mes-hall
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约瑟夫森电流对磁矩的控制

Magnetic moment manipulation by a Josephson current

François Konschelle, Alexandre Buzdin

摘要:

我们考虑了弱连接由非中心对称铁磁体形成的约瑟夫森结。在这样的结中,超导电流作为对磁矩的直接驱动力。我们表明,交流。约瑟夫森效应产生磁旋进,然后提供对电流的反馈。磁动力学的结果在几个异常的电流相位关系(二次谐波,耗散电流),强烈增强附近的铁磁共振频率。

英文摘要:

We consider a Josephson junction where the weak-link is formed by a non-centrosymmetric ferromagnet. In such a junction, the superconducting current acts as a direct driving force on the magnetic moment. We show that the a.c. Josephson effect generates a magnetic precession providing then a feedback to the current. Magnetic dynamics result in several anomalies of current-phase relations (second harmonic, dissipative current) which are strongly enhanced near the ferromagnetic resonance frequency.

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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