Hot electron spin attenuation lengths of bcc Fe34 Co66-Room temperature Magnetocurrent of 1200%

E. Heindl, C. Kefes, M. Soda, J. Vancea, C. H. Back

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

We investigate spin-dependent hot electron transport through metallic epitaxial spin valves by ballistic electron magnetic microscopy (BEMM). By variation of the thickness of one of the ferromagnetic layers we determine the spin dependent attenuation lengths which reflect hot electron transport along the vicinity of the [1 0 0]-axis of the bcc Fe34 Co66 lattice. The majority spin attenuation length is more than 6 times larger than that of the minority spins within the measured energy interval of 1.3 up to 2 eV above the Fermi level. Consequently a Magnetocurrent effect exceeding 1200% accompanied by a monotonic bias voltage behavior is observed at room temperature.

Original languageEnglish
Pages (from-to)3693-3697
Number of pages5
JournalJournal of Magnetism and Magnetic Materials
Volume321
Issue number22
DOIs
StatePublished - Nov 2009
Externally publishedYes

Keywords

  • BEMM
  • Ballistic transport
  • MTT

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