Estimation of the spin polarization for Heusler-compound thin films by means of nonlocal spin-valve measurements: Comparison of Co 2FeSi and Fe 3Si

K. Hamaya, N. Hashimoto, S. Oki, S. Yamada, M. Miyao, T. Kimura

Research output: Contribution to journalArticle

57 Citations (Scopus)

Abstract

We study room-temperature generation and detection of pure spin currents using lateral spin-valve devices with electrodes formed from the Heusler compounds Co 2FeSi (CFS) or Fe 3Si (FS). The magnitude of the nonlocal spin-valve signals is strongly affected by resistivity variations observed particularly in low-temperature-grown Heusler compounds containing ordered structures. From an analysis based on a one-dimensional spin diffusion model, we find that the spin polarization monotonically increases with decreasing resistivity, which depends on the structural ordering, for both the CFS and FS electrodes, and show that CFS has a larger spin polarization than FS.

Original languageEnglish
Article number100404
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume85
Issue number10
DOIs
Publication statusPublished - Mar 13 2012

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Estimation of the spin polarization for Heusler-compound thin films by means of nonlocal spin-valve measurements: Comparison of Co <sub>2</sub>FeSi and Fe <sub>3</sub>Si'. Together they form a unique fingerprint.

  • Cite this