Spin currents injected electrically and thermally from highly spin polarized Co2MnSi

Alexander Pfeiffer, Shaojie Hu, Robert M. Reeve, Alexander Kronenberg, Martin Jourdan, Takashi Kimura, Mathias Kläui

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

We demonstrate the injection and detection of electrically and thermally generated spin currents probed in Co2MnSi/Cu lateral spin valves. Devices with different electrode separations are patterned to measure the non-local signal as a function of the electrode spacing and we determine a relatively high effective spin polarization α of Co2MnSi to be 0.63 and the spin diffusion length of Cu to be 500 nm at room temperature. The electrically generated non-local signal is measured as a function of temperature and a maximum signal is observed for a temperature of 80 K. The thermally generated non-local signal is measured as a function of current density and temperature in a second harmonic measurement detection scheme. We find different temperature dependences for the electrically and thermally generated non-local signals, which allows us to conclude that the temperature dependence of the signals is not just dominated by the transport in the Cu wire, but there is a crucial contribution from the different generation mechanisms, which has been largely disregarded till date.

Original languageEnglish
Article number082401
JournalApplied Physics Letters
Volume107
Issue number8
DOIs
Publication statusPublished - Aug 24 2015

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Fingerprint Dive into the research topics of 'Spin currents injected electrically and thermally from highly spin polarized Co<sub>2</sub>MnSi'. Together they form a unique fingerprint.

  • Cite this

    Pfeiffer, A., Hu, S., Reeve, R. M., Kronenberg, A., Jourdan, M., Kimura, T., & Kläui, M. (2015). Spin currents injected electrically and thermally from highly spin polarized Co2MnSi. Applied Physics Letters, 107(8), [082401]. https://doi.org/10.1063/1.4929423