Planes of continuous-wave oscillations from an electron nanocontact spin-transfer device

G. P. Cameron, D. J. Schraufnagel, W. H. Fjerstad, V. Sokolov, E. S. Daniel, B. K. Gilbert

Research output: Contribution to journalArticle

Abstract

We have found that the frequencies of continuous-wave (CW) microwave oscillations in nanocontact spin-transfer (ST) devices occur in well-defined planes of frequencies, as a function of the dc current bias, the direction of the magnetic field, and the magnitude of the magnetic field. The frequency, f, of these technologically significant peaks for each magnetic field direction is described empirically by the equation of a plane, f = a|B→| + bI + c, where |B→| is the magnitude of the magnetic field, I is the dc bias current, and a, b, and c are constants of the plane. The primary frequency plane described by this equation is accompanied by a smaller secondary plane. The empirical equation describing the primary plane serves as a guide for efficiently locating CW oscillations within the independent variable space.

Original languageEnglish (US)
Pages (from-to)1934-1940
Number of pages7
JournalIEEE Transactions on Magnetics
Volume43
Issue number5
DOIs
StatePublished - May 1 2007

Keywords

  • Continuous-wave oscillation
  • Frequency plane
  • Magnetic nanocontact device
  • Spin-transfer

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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