DocumentCode
1045722
Title
Acoustic Faraday rotation
Author
Wang, Shyh ; Crow, John
Author_Institution
University of California, Berkeley, California, USA
Volume
7
Issue
1
fYear
1971
fDate
3/1/1971 12:00:00 AM
Firstpage
138
Lastpage
141
Abstract
In ferrimagnets, under a dc magnetic field, magnon-phonon coupling can result in such effects as acoustic birefringence and Faraday rotation. From our work on acoustic Faraday rotation in nonellipsoidal samples of YIG, we found three regions of rotation. The low field region has an internal magnetic field insufficient for effective phonon-magnon conversion. Fitting the rotation observed to the theory we find values for the second magnetoelastic constant and the average demagnetizing field. Between the low and middle field regions a decrease in the amplitude of the transmitted elastic wave was observed and attributed to spin-wave losses. The middle field region was characterized by conversion of elastic energy into spin waves. Regions of inefficient conversion were observed. Faraday rotation was again observed in the high field region.
Keywords
Acoustic Faraday effect; Magnetoelastic effects; Spin waves; YIG; Acoustic measurements; Acoustic pulses; Acoustic transducers; Acoustic waves; Birefringence; Couplings; Demagnetization; Magnetic field measurement; Magnetoelasticity; Rotation measurement;
fLanguage
English
Journal_Title
Magnetics, IEEE Transactions on
Publisher
ieee
ISSN
0018-9464
Type
jour
DOI
10.1109/TMAG.1971.1067017
Filename
1067017
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