Accession Number : AD0680410

Title :   RESEARCH DIRECTED TOWARD EXCITATION OF MAGNETOACOUSTIC WAVES AT MICROWAVE FREQUENCIES.

Descriptive Note : Final rept. 1 May 67-31 Jul 68,

Corporate Author : SPERRY RAND RESEARCH CENTER SUDBURY MASS

Personal Author(s) : Shane,John R. ; Matthews,Herbert ; van de Vaart,Herman ; Kestigian,Michael

Report Date : AUG 1968

Pagination or Media Count : 103

Abstract : The instability threshold has been derived for several processes involving transversely pumped magnetoelastic waves in YIG. The resonance properties of FeF3 have been studied at 70 GHz. The spin configurations and resonance frequencies for a two-sublattice model of a canted orthorhombic antiferromagnet have been examined. Unstable spin waves have been parametrically excited by transverse phonons travelling in a Ga-YIG cylinder and sphere. Scattering of magnetoelastic modes by a free boundary was analyzed. (Author)

Descriptors :   (*IRON COMPOUNDS, *ULTRASONIC RADIATION), (*MAGNETOSTRICTION, IRON COMPOUNDS), GARNET, FLUORIDES, YTTRIUM COMPOUNDS, FERRITES, RESONANT FREQUENCY, MICROWAVE FREQUENCY, PHONONS, INTERACTIONS, MAGNETIC RESONANCE, ANTIFERROMAGNETISM

Subject Categories : Acoustics
      Electricity and Magnetism
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE