First Order Temperature Corrections to the Frequency Moments of the Spectral Function of Anisotropic Heisenberg Spin Systems

Abstract

The first-order temperature corrections to the zeroth and second, longitudinal and transverse, wave-vector-dependent frequency moments are calculated for a Heisenberg spin system with uniaxial and exchange anisotropy and with an arbitrary interaction range. These moments are applied to several lattices, including the hexagonal close-packed structure of terbium, which possesses a large uniaxial anisotropy constant. The calculated energy transfer of magnetically scattered neutrons is shown to be in good agreement with experimental data for terbium and also gives evidence of a significant short-range-order effect.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1973
Accession Number
AD0777766

Entities

People

  • Frederick A. Malinoski

Organizations

  • Frankford Arsenal

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Abstracts
  • Agreements
  • Anisotropy
  • Commerce
  • Couplings
  • Critical Temperature
  • Crystal Lattices
  • Crystal Structure
  • Cubic Lattices
  • Energy
  • Energy Transfer
  • Engineering
  • Equations
  • Experimental Data
  • Frequency
  • High Temperature
  • Inelastic Scattering
  • Low Temperature
  • Magnetic Materials
  • Neel Temperature
  • Neutron Scattering
  • Quantum Properties
  • Scattering
  • Transverse
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Calculus or Mathematical Analysis
  • Materials Science and Engineering.