M. Bauer et al., Time domain MOKE detection of spin wave modes and precession control for magnetization switching in ferrite films, J MAGN MAGN, 226, 2001, pp. 507-509
The dynamic magnetization response to pulse fields for magnetic garnet film
s was measured by time-resolved magneto-optical Kerr effect techniques. A d
amped precession. or ringing, is found when the pulse is turned on or off.
The ringing amplitude after turn off shows alternating maxima and minima as
the static field is changed. A fast Fourier transform analysis gives peaks
at frequencies which match those expected from ferromagnetic and spin wave
resonance for fields above 25 Oe. Lower frequency modes indicative of surf
ace anisotropy are also found. The change in intensity with field for the t
wo strongest peaks tracks the variation in the ringing amplitude. (C) 2001
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