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Zero-dimensional spin accumulation and spin dynamics in a mesoscopic metal island

M. Zaffalon·B. J. van Wees
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Abstract

We have measured electron spin accumulation at 4.2 K and at room temperature in an aluminium island with all dimensions (400nm x 400nm x 30nm) smaller than the spin relaxation length. For the first time, we obtain uniform spin accumulation in a four-terminal lateral device with a magnitude exceeding the ohmic resistance in the island. By controlling the magnetisation directions of the four magnetic electrodes that contact the island, we have performed a detailed study of the spin accumulation. Spin precession measurements confirm the uniformity of our system and provide an accurate method to extract the spin relaxation time.

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M. Zaffalon, B. J. van Wees. 2003-08-20. Zero-dimensional spin accumulation and spin dynamics in a mesoscopic metal island. https://doi.org/10.1103/physrevlett.91.186601

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