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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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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  • Cite this

    Kasai, S., Hirayama, S., Takahashi, Y. K., Mitani, S., Hono, K., Adachi, H., Ieda, J., & Maekawa, S. (2014). Thermal engineering of non-local resistance in lateral spin valves. Applied Physics Letters, 104(16), [162410]. https://doi.org/10.1063/1.4873687