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Electrical detection of spin precession in a metallic mesoscopic spin valve

Author

Listed:
  • F. J. Jedema

    (University of Groningen)

  • H. B. Heersche

    (University of Groningen)

  • A. T. Filip

    (University of Groningen)

  • J. J. A. Baselmans

    (University of Groningen)

  • B. J. van Wees

    (University of Groningen)

Abstract

To study and control the behaviour of the spins of electrons that are moving through a metal or semiconductor is an outstanding challenge in the field of ‘spintronics’, where possibilities for new electronic applications based on the spin degree of freedom are currently being explored1,2,3,4,5. Recently, electrical control of spin coherence6 and coherent spin precession during transport7 was studied by optical techniques in semiconductors. Here we report controlled spin precession of electrically injected and detected electrons in a diffusive metallic conductor, using tunnel barriers in combination with metallic ferromagnetic electrodes as spin injector and detector. The output voltage of our device is sensitive to the spin degree of freedom only, and its sign can be switched from positive to negative, depending on the relative magnetization of the ferromagnetic electrodes. We show that the spin direction can be controlled by inducing a coherent spin precession caused by an applied perpendicular magnetic field. By inducing an average precession angle of 180°, we are able to reverse the sign of the output voltage.

Suggested Citation

  • F. J. Jedema & H. B. Heersche & A. T. Filip & J. J. A. Baselmans & B. J. van Wees, 2002. "Electrical detection of spin precession in a metallic mesoscopic spin valve," Nature, Nature, vol. 416(6882), pages 713-716, April.
    • Handle: RePEc:nat:nature:v:416:y:2002:i:6882:d:10.1038_416713a
    DOI: 10.1038/416713a
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