Spin wave excitation patterns generated by spin torque oscillators

F. Macià, F. C. Hoppensteadt, A. D. Kent

    Research output: Contribution to journalArticle

    Abstract

    Spin torque nano-oscillators (STNO) are nanoscale devices that can convert a direct current into short wavelength spin wave excitations in a ferromagnetic layer. We show that arrays of STNO can be used to create directional spin wave radiation similarly to electromagnetic antennas. Combining STNO excitations with planar spin waves also creates interference patterns. We show that these interference patterns are static and have information on the wavelength and phase of the spin waves emitted from the STNO. We describe a means of actively controlling spin wave radiation patterns with the direct current flowing through STNO, which is useful in on-chip communication and information processing and could be a promising technique for studying short wavelength spin waves in different materials.

    Original languageEnglish (US)
    Article number045303
    JournalNanotechnology
    Volume25
    Issue number4
    DOIs
    StatePublished - Jan 31 2014

    Fingerprint

    Spin waves
    Torque
    Wavelength
    Antennas
    Radiation
    Communication

    Keywords

    • interference patterns
    • spin torque oscillators
    • spin waves

    ASJC Scopus subject areas

    • Bioengineering
    • Chemistry(all)
    • Electrical and Electronic Engineering
    • Mechanical Engineering
    • Mechanics of Materials
    • Materials Science(all)

    Cite this

    Spin wave excitation patterns generated by spin torque oscillators. / Macià, F.; Hoppensteadt, F. C.; Kent, A. D.

    In: Nanotechnology, Vol. 25, No. 4, 045303, 31.01.2014.

    Research output: Contribution to journalArticle

    Macià, F. ; Hoppensteadt, F. C. ; Kent, A. D. / Spin wave excitation patterns generated by spin torque oscillators. In: Nanotechnology. 2014 ; Vol. 25, No. 4.
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