Electromagnetic Emission by a System of Nonequilibrium Magnons in a Ferrite.

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  • Taranenko Alexandr Yu.
    Department of Radiophysics, Taras Shevchenko Kiev University, 252017 Kiev, Ukraine
  • Mino Michinobu
    Department of Physics, Faculty of Science, Okayama University, Okayama 700
  • Yamazaki Hitoshi
    Department of Physics, Faculty of Science, Okayama University, Okayama 700
  • Safonov Vladimir L.
    Institute of Molecular Physics, Russian Research Center “Kurchatov Institute”, 123182 Moscow, Russia

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  • Electromagnetic Emission by a System of

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Spectra of electromagnetic emission of frequencies ≅ ωi, 2ωi and 3ωi, where ωi is the bottom ofthe spin-wave band have been studied in yttrium iron garnetat temperatures of liquid nitrogen and liquid helium.The spin-wave system was strongly excited by parallel pumpingwith microwaves of frequency ωp > 2 ωi.Line shapes and frequency shifts of the emission depend ontemperature, static magnetic field, pump power and time durationof the pump pulse. Discussion of obtained results is given.

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