SATURATION EFFECTS IN FERRIMAGNETIC RESONANCE,

Abstract

Saturation curves of susceptibility as a function of rf magnetic field have been measured for a number of samples of polycrystalline yttrium iron garnet of varying linewidth. The curves exhibit a region of susceptibility linear in l/h at high rf powers. The region of the initial decline in susceptibility is linear in h(squared) which is predicted both by a small signal relation derived from Callen's ferromagnetic dynamical equation and by a calculation of Schlomann which includes inhomogeneity interactions. A new method of determining the critical field for spinwave build-up is discussed. This method takes account of the fact that the initial decline in suscep tibility is not simply due to the Suhl mechanism for saturation in ferrites. (Author)

Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1959
Accession Number
AD0416152

Entities

People

  • H.j. Shaw
  • P.e. Seiden

Organizations

  • Lockheed Martin Missiles and Space

Tags

DTIC Thesaurus Topics

  • Elements
  • Equations
  • Garnet
  • Group 3 Elements
  • Magnetic Fields
  • Metals
  • Polycrystals
  • Power
  • Radio Frequency Power
  • Rare Earth Elements
  • Resonance
  • Saturation
  • Yttrium
  • Yttrium Iron Garnet

Fields of Study

  • Physics

Readers

  • Mathematics or Statistics
  • Microwave Engineering.
  • Superconducting Magnet Technology