Accession Number:

AD0619604

Title:

SPIN-WAVE EFFECTS IN MAGNETIC-FILM SWITCHING,

Descriptive Note:

Corporate Author:

MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB

Personal Author(s):

Report Date:

1964-01-01

Pagination or Media Count:

2.0

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

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE