TITLE

Tunable field imbalance and spin precession in magnetic double layers

AUTHOR(S)
Au, Y.; Sooryakumar, R.; Bussmann, K.
PUB. DATE
November 2004
SOURCE
Applied Physics Letters;11/15/2004, Vol. 85 Issue 20, p4675
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We report on the manipulation of spin-wave mode profiles by a field imbalance in magnetic double layers produced by the combination of an external field (Hext) and an in-plane spacer layer current-induced Amperian field (Hcur). The magnetizations between layers are tuned from antiparallel to parallel alignment and the associated oscillation amplitudes monitored by Brillouin light scattering. While the results are well accounted for by Maxwell and Landau-Lifshitz equations, a mechanical coupled pendulum analog in a variable unbalanced gravitational acceleration (Δg) provides insight into the underlying physics. It is pointed out that the application of magnetic field pulses of specific strength and duration will lead to direct cross-communication between spin-wave normal modes, a feature unique to the tunable local imbalanced field.
ACCESSION #
15075061

 

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