SPIN-LATTICE RELAXATION OF Fe57 NUCLEI IN YTTRIUM IRON GARNET,

Abstract

Pulse measurements of T1 for Fe57 nuclei in very pure, single crystals of YIG are reported. The temperature was varied from 2 K to 40 K, and the externally applied field ranged from 0 to 6000 Oe. The temperature variation of T1 is quite strong, being three orders of magnitude in the range 2-40K. At constant temperature, T1 changed approximately one order of magnitude between saturation field and 6000 Oe. The data are compared with the results of a calculation by Beeman and Pincus, in which a second-order Raman process is assumed to predominate in this temperature range. The presence of a relaxation mechanism associated with surface spin-wave modes is suggested. (Author)

Document Details

Document Type
Technical Report
Publication Date
May 25, 1969
Accession Number
AD0693301

Entities

People

  • Horst Meyer
  • J. P. Remeika
  • Samuel M. Myers

Organizations

  • Duke University

Tags

DTIC Thesaurus Topics

  • Cooperation
  • Crystals
  • Elements
  • Garnet
  • Group 3 Elements
  • Measurement
  • Metals
  • Rare Earth Elements
  • Saturation
  • Single Crystals
  • Spin Waves
  • Yttrium
  • Yttrium Iron Garnet

Fields of Study

  • Physics

Readers

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