SPIN WAVE ANISOTROPY IN PARALLEL PUMPING EXPERIMENTS ON YIG,

Abstract

A theoretical and experimental investigation of magnetic anisotropy effects on spin wave excitation in parallel pumping experiments has been conducted. The experiments were performed at Xband frequencies on single crystal yttrium iron garnet. Anisotropy is introduced into the framework of existing theory. The spin wave dispersion relation and instability thresholds for pumping in a (110) crystallographic direction are derived. A number of experimental butterfly curves for various temperatures, crystallographic orientations, and geometries are obtained and compared with the theoretical predictions. A new effect, experimentally observable as an extra corner on the butterfly curves (separate from the phonon peaks), is shown to be directly related to the anisotropy produced splitting of the top of the spin wave band. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1964
Accession Number
AD0435540

Entities

People

  • James C. Sethares
  • Marden H. Seavey Jr.
  • Martin R. Stiglitz

Organizations

  • Air Force Cambridge Research Laboratories

Tags

DTIC Thesaurus Topics

  • Anisotropy
  • Crystals
  • Dispersion Relations
  • Dispersions
  • Excitation
  • Frequency
  • Garnet
  • Geometry
  • Instability
  • Lepidoptera
  • Magnetic Anisotropy
  • Orientation (Direction)
  • Single Crystals
  • Spin Waves
  • Splitting
  • Yttrium Iron Garnet

Fields of Study

  • Physics

Readers

  • Graph Algorithms and Convex Optimization.
  • Materials Science and Engineering.
  • Quantum spin resonance or Electron Paramagnetic Resonance spectroscopy.