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Nonlinear cavity-magnonics system based on a superthin yttrium-iron-garnet film
Grishin S. V.
1
1Saratov State University, Saratov, Russia
Email: sergrsh@yandex.ru
The paper presents the results of an experimental study of the system consisting of a microstrip half-wave resonator (MSHWR) and superthin yttrium-iron-garnet (YIG) film at higher power levels. It has been shown that in the linear mode the superthin YIG film located in the alternating current antinode of the MSHWR fundamental oscillation operates as a gyromagnetic resonator (GMR) at the ferromagnetic resonance (FMR) frequency. The latter is determined by the external static magnetic field orientation transverse to the distribution of the MSHWR standing wave alternating current. The study has established that, if MSHWR is replaced with a microstrip transmission line operating in the traveling wave mode, then the superthin YIG film does not act as GMR at the same static magnetic field orientation with respect to the microstrip conductor. In the nonlinear mode, the "MSHWR-superthin YIG film" system is a multifunctional nonlinear device with power thresholds lower than in the case of micron-thick YIG films. Keywords: cavity magnonics, superthin YIG films, nonlinear ferromagnetic resonance.
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