Time-resolved study of nonlinear three-magnon processes in yttrium iron garnet films
Por:
Liu, H. J. Jason, Riley G.A., Ordonez-Romero, Cesar L., Kalinikos B.A., Buchanan K.S.
Publicada:
25 ene 2019
Resumen:
In this work, the temporal aspects of two nonlinear spin-wave processes,
i.e., three-magnon splitting and confluence, were investigated in a
yttrium iron garnet film. Three-magnon splitting involves the conversion
of a magnon at the microwave pumping frequency f(p) into two magnons,
each with a frequency near f(p)/2, while confluence refers to the
subsequent combination of two of the split magnons into one with
frequency f(c) < f(p). Time-resolved Brillouin scattering measurements
confirm that these processes occur close to the driving antenna (<1.7 mm
away), which is expected. The data indicate, however, that magnons with
larger group velocities are more likely to undergo confluence, which is
not predicted by existing theory. Understanding the details of the
splitting and confluence processes may have important implications for
the use of short-wavelength spin waves for spintronic devices.
Filiaciones:
Liu, H. J. Jason:
Colorado State Univ, Dept Phys, Ft Collins, CO 80523 USA
Georgia Southern Univ, Dept Phys & Astron, Statesboro, GA 30460 USA
Riley G.A.:
Colorado State Univ, Dept Phys, Ft Collins, CO 80523 USA
Department of Physics, Colorado State University, Fort Collins, CO 80523, United States
Ordonez-Romero, Cesar L.:
Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 04510, DF, Mexico
Kalinikos B.A.:
St Petersburg Electrotech Univ, St Petersburg 197376, Russia
St. Petersburg Electrotechnical University, St. Petersburg, 197376, Russian Federation
Buchanan K.S.:
Colorado State Univ, Dept Phys, Ft Collins, CO 80523 USA
Department of Physics, Colorado State University, Fort Collins, CO 80523, United States
Department of Physics and Astronomy, Georgia Southern University, Statesboro, GA 30460, United States
Instituto de Física, Universidad Nacional Autónoma de México, Ciudad Universitaria, México, 04510, Mexico
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