Accession Number:

AD0777766

Title:

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

Descriptive Note:

Technical research rept.,

Corporate Author:

FRANKFORD ARSENAL PHILADELPHIA PA

Personal Author(s):

Report Date:

1973-06-01

Pagination or Media Count:

40.0

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. Author

Subject Categories:

  • Solid State Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE