Evidence for the Role of the Magnon Energy Relaxation Length in the Spin Seebeck Effect

Abstract

Temperature-dependent spin Seebeck effect data on Pt|yttrium iron garnet (YIG) (Y3Fe5O12)|gallium gadolinium garnet (Gd3Ga5O12) are reported for YIG films of various thicknesses. The effect is reported as a spin Seebeck resistivity (SSR), the inverse spin-Hall field divided by the heat flux, to circumvent uncertainties about temperature gradients inside the films. The SSR is a nonmonotonic function of YIG thickness. A diffusive model for magnon transport demonstrates how these data give evidence for the existence of two distinct length scales in thermal spin transport, a spin-diffusion length, and a magnon energy relaxation length.

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Document Details

Document Type
Technical Report
Publication Date
Jan 29, 2018
Accession Number
AD1070395

Entities

People

  • Arati Prakash
  • Benedetta Flebus
  • Fengyuan Yang
  • Jack Brangham
  • Joseph P. Heremans
  • Yaroslav Tserkovnyak

Organizations

  • Ohio State University

Tags

DTIC Thesaurus Topics

  • Conductivity
  • Detection
  • Energy
  • Energy Transfer
  • Films
  • Heat Energy
  • Heat Flux
  • Materials
  • Materials Science
  • Measurement
  • Physical Properties
  • Quantum Properties
  • Seebeck Effect
  • Spin-Orbit Interaction
  • Temperature Gradients
  • Thermal Conductivity
  • Thickness

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Microwave Engineering.
  • Quantum spin resonance or Electron Paramagnetic Resonance spectroscopy.

Technology Areas

  • Microelectronics