Accession Number:

AD0435540

Title:

SPIN WAVE ANISOTROPY IN PARALLEL PUMPING EXPERIMENTS ON YIG,

Descriptive Note:

Corporate Author:

AIR FORCE CAMBRIDGE RESEARCH LABS HANSCOM AFB MA

Report Date:

1964-01-01

Pagination or Media Count:

72.0

Abstract:

A theoretical and experimental investigation of magnetic anisotropy effects on spin wave excitation in parallel pumping experiments has been conducted. The experiments were performed at Xband frequencies on single crystal yttrium iron garnet. Anisotropy is introduced into the framework of existing theory. The spin wave dispersion relation and instability thresholds for pumping in a 110 crystallographic direction are derived. A number of experimental butterfly curves for various temperatures, crystallographic orientations, and geometries are obtained and compared with the theoretical predictions. A new effect, experimentally observable as an extra corner on the butterfly curves separate from the phonon peaks, is shown to be directly related to the anisotropy produced splitting of the top of the spin wave band. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE