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

研究成果: ジャーナルへの寄稿学術誌査読

13 被引用数 (Scopus)

抄録

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.

本文言語英語
論文番号082401
ジャーナルApplied Physics Letters
107
8
DOI
出版ステータス出版済み - 8月 24 2015

!!!All Science Journal Classification (ASJC) codes

  • 物理学および天文学(その他)

フィンガープリント

「Spin currents injected electrically and thermally from highly spin polarized Co2MnSi」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル