HARMONIC GENERATION IN FERROMAGNETIC ELLIPSOIDS OF REVOLUTION

Abstract

Aspects of the magnetostatics of small ferromagnetic ellipsoids immersed in arbitrarily directed uniform magnetic fields are reviewed. Ferromagnetic resonance under these conditions is discussed, and theoretical information on the orientation of ellipsoids of revolution in these uniform fields necessary to produce resonance at L, S, and X band frequencies, in samples with saturation magnetizations of 1000, 1700, and 3000 gauss with the internal field arbitrarily directed, is graphically presented. Harmonic generation processes existing in these general geometries are analyzed. Harmonic components of the magnetization vector are found to occur both parallel and perpendicular to the internal magnetic field. Frequency doubling experiments, performed at S band on a thin polycrystalline disk of yttrium-iron garnet, supported these predictions and are reported. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1961
Accession Number
AD0267013

Entities

People

  • Glenn E. Bennett

Organizations

  • Air Force Cambridge Research Laboratories

Tags

DTIC Thesaurus Topics

  • Demographic Cohorts
  • Ellipsoids
  • Ferromagnetic Resonance
  • Frequency
  • Garnet
  • Geometry
  • Magnetic Fields
  • Magnetization
  • Magnetostatics
  • Orientation (Direction)
  • Polycrystals
  • Resonance
  • Resonant Frequency
  • Revolutions
  • X Band
  • Yttrium Iron Garnet

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Plasma Physics / Magnetohydrodynamics
  • Structural Dynamics.