Spin Wave Propagation in Non-Uniform Magnetic Fields

Abstract

This paper reports high resolution time- and space-resolved imagining of spin wave propagation in magnetic thin films under spatially non-uniform magnetic field configurations. The experiment was carried out with a yttrium iron garnet film strip magnetized with a spatially non-uniform magnetic field parallel to the length of the film strip. Spin wave pulses were excited with a microstrip transducer at one end of the strip. The propagation of spin wave pulses was mapped with a time- and space-resolved inductive magnetodynamic probe. The wave number of the carrier for the spin wave pulses was found to increase in a spatially increasing magnetic field and decrease in a spatially decreasing magnetic field. The wave number change for a general spatially varying static field is reversible.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 2006
Accession Number
ADA481491

Entities

People

  • Carl E. Patton
  • Kevin R. Smith
  • Michael J. Kabatek
  • Mingzhong Wu

Organizations

  • Colorado State University

Tags

Communities of Interest

  • Air Platforms
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Carrier Frequencies
  • Carrier Waves
  • Data Acquisition
  • Excitation
  • Ferromagnetic Resonance
  • Films
  • Frequency
  • Group Velocity
  • Magnetic Fields
  • Military Research
  • Signal Processing
  • Spin Waves
  • Transducers
  • Wave Propagation
  • Waveforms
  • Waves
  • Yttrium Iron Garnet

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Microwave Engineering.
  • Pulsed Power and Plasma Physics.

Technology Areas

  • Microelectronics
  • Space
  • Space - Hall-Effect Thruster