Magnetization switching in a garnet thin film

An improved technique for observing subnanosecond magnetization changes in thin films has been used to study the underdamped oscillatory behavior in a (Y 2.5 Gd 0.5 ) (Fe 4 Ga 1 )O 12 sample. The measurement setup uses a version of the alternate sampling technique in which the sensitivity has been u...

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Bibliographic Details
Published in:IEEE transactions on magnetics 1975-01, Vol.11 (1), p.12-15
Main Authors: White, J., Powell, C., Lynch, G.
Format: Article
Language:English
Subjects:
Amplifiers
Garnet films
Iron
Magnetic field measurement
Magnetic films
Magnetic switching
Magnetization
Resonant frequency
Sampling methods
Stripline
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Summary:An improved technique for observing subnanosecond magnetization changes in thin films has been used to study the underdamped oscillatory behavior in a (Y 2.5 Gd 0.5 ) (Fe 4 Ga 1 )O 12 sample. The measurement setup uses a version of the alternate sampling technique in which the sensitivity has been upgraded by the use of a lock-in amplifier. By using a shorted stripline of appropriate length to apply to the film two properly timed magnetic field steps, the precession of the magnetization can be quelled, and the magnetization can be switched between initial and final directions in a half-cycle of the resonant frequency.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.1975.1058547