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arXiv 1803.09784cond-mat.mes-hallcond-mat.mtrl-sci
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纳米尺度下霍尔效应的三探针测量

Measurement of the Hall effect at nanoscale with three probes

G. X. Chen, R. X. Cao, A. Zholud, S. Urazhdin

摘要:

霍尔效应及其变体,如量子、反常和自旋霍尔效应,为材料的电磁性质表征、计量学和自旋电子学提供了不可或缺的工具。由于霍尔电极的电流分流,传统的四探针霍尔配置通常不适合纳米级的测量。我们证明,霍尔测量的纳米尺度上,可以方便的三探针霍尔配置,避免了分流问题。我们说明了所提出的方法的效率与异常霍尔效应为基础的测量在垂直各向异性的磁性薄膜畴壁运动过程中的个别激活事件。

英文摘要:

The Hall effect and its varieties such as quantum, anomalous, and spin Hall effects, provide indispensable tools for the characterization of electronic and magnetic properties of materials, metrology, and spintronics. The conventional four-probe Hall configuration is generally not amenable to measurements at nanoscale, due to current shunting by the Hall electrodes. We demonstrate that Hall measurements on the nanoscale can be facilitated by the three-probe Hall configuration that avoids the shunting problem. We illustrate the efficiency of the proposed approach with anomalous Hall effect-based measurements of individual activation events during domain wall motion in magnetic films with perpendicular anisotropy.

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