Accession Number : AD0619604

Title :   SPIN-WAVE EFFECTS IN MAGNETIC-FILM SWITCHING,

Corporate Author : MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB

Personal Author(s) : Harte,K. J.

Report Date : 1964

Pagination or Media Count : 2

Abstract : The nonlinear reaction of dispersion-induced spin waves on the uniform mode m has been calculated for a thin film undergoing rapid rotational magnetization reversal. It is found that if m rotates faster than longitudinal spin waves can relax, the magnetization goes through a transient state of high magnetostatic energy. If the pulse switching field is less than a critical field H, the uniform mode becomes locked at some point in the reversal process; rotational switching cannot proceed until initially longitudinal spin waves have relaxed into components propagating in the instantaneous direction of m, a highly damped process suggestive of the intermediate-speed reversal mode observed in thin films. The dependence of H on a dc bias field has been verified experimentally; the dispersion dependence should provide a crucial test of the theory. (Author)

Descriptors :   (*MAGNETIC PROPERTIES, MAGNETIC MATERIALS), MAGNETIC FIELDS, SPINNING(MOTION), FILMS, OSCILLATION

Distribution Statement : APPROVED FOR PUBLIC RELEASE