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arXiv 1906.02730cond-mat.mes-hall
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由驱动磁体几何产生的电流噪声

Current noise geometrically generated by a driven magnet

Tim Ludwig, Igor S. Burmistrov, Yuval Gefen, Alexander Shnirman

摘要:

我们考虑一个非平衡的交叉响应现象,由此驱动磁化引起电散粒噪声(但没有直流电流)。这种效应是在纳米尺度上实现的,用一个小的金属铁磁体隧道耦合到两个正常的金属引线。驱动引起旋进磁化。几何产生的噪声与铁磁体中的非平衡分布有关。我们的协议提供了一个新的通道检测和表征铁磁共振。

英文摘要:

We consider a non-equilibrium cross-response phenomenon, whereby a driven magnetization gives rise to electric shot noise (but no d.c. current). This effect is realized on a nano-scale, with a small metallic ferromagnet which is tunnel-coupled to two normal metal leads. The driving gives rise to a precessing magnetization. The geometrically generated noise is related to a non-equilibrium distribution in the ferromagnet. Our protocol provides a new channel for detecting and characterizing ferromagnetic resonance.

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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