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arXiv 1111.5430cond-mat.mes-hall
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铁磁单电子器件中各向异性磁库仑效应与自旋积累的关系

Anisotropic magneto-Coulomb effect versus spin accumulation in a ferromagnetic single-electron device

A. Bernand-Mantel, P. Seneor, K. Bouzehouane, S. Fusil, C. Deranlot, F. Petroff, A. Fert

摘要:

我们研究了纳米自旋电子学单电子器件的磁输运特性。该设备由单个非磁性纳米物体(纳米尺寸的Al或Cu纳米粒子)连接到Co铁磁导线。与模拟的比较使我们能够将所观察到的磁阻归因于自旋累积或各向异性磁库仑效应(AMC),这两种效应具有非常不同的起源。这两种效应在类似样品中观察到的事实表明,库仑阻塞和磁阻行为的仔细分析是必要的,以区分它们在磁性单电子器件。作为进一步研究的工具,我们提出了一种简单的方法来根据自旋电子学器件的库仑阻塞I-V曲线确定自旋输运或AMC效应是否占主导地位。

英文摘要:

We investigate the magneto-transport characteristics of nanospintronics single-electron devices. The devices consist of single non-magnetic nano-objects (nanometer size nanoparticles of Al or Cu) connected to Co ferromagnetic leads. The comparison with simulations allows us attribute the observed magnetoresistance to either spin accumulation or anisotropic magneto-Coulomb effect (AMC), two effects with very different origins. The fact that the two effects are observed in similar samples demonstrates that a careful analysis of Coulomb blockade and magnetoresistance behaviors is necessary in order to discriminate them in magnetic single-electron devices. As a tool for further studies, we propose a simple way to determine if spin transport or AMC effect dominates from the Coulomb blockade I-V curves of the spintronics device.

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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