Thermal engineering of non-local resistance in lateral spin valves

S. Kasai, S. Hirayama, Y. K. Takahashi, S. Mitani, K. Hono, H. Adachi, J. Ieda, S. Maekawa

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    9 Citations (Scopus)

    Abstract

    We study the non-local spin transport in Permalloy/Cu lateral spin valves (LSVs) fabricated on thermally oxidized Si and MgO substrates. While these LSVs show the same magnitude of spin signals, significant substrate dependence of the baseline resistance was observed. The baseline resistance shows much weaker dependence on the inter-electrode distance than that of the spin transport observed in the Cu wires. A simple analysis of voltage-current characteristics in the baseline resistance indicates the observed result can be explained by a combination of the Peltier and Seebeck effects at the injector and detector junctions, suggesting the usage of high thermal conductivity substrate (or under-layer) is effective to reduce the baseline resistance.

    Original languageEnglish
    Article number162410
    JournalApplied Physics Letters
    Volume104
    Issue number16
    DOIs
    Publication statusPublished - Apr 21 2014

    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)

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