Parametric regeneration of spin oscillations of a thin-film ferromagnetic cavity by microwave pumping |
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| Authors: | B A Kalinikos N G Kovshikov E A Ospanov |
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| Affiliation: | (1) St. Petersburg State Electrical Engineering University, St. Petersburg |
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| Abstract: | An experimental investigation is made of the regeneration of spin oscillation losses in a thin-film ferromagnetic cavity by
parametric pumping. It is observed that effective regeneration only takes place in narrow frequency intervals in zones of
strong dispersion near dipole gaps in the spin wave spectrum of thin films with bounded mobility of the surface spins. It
is shown that microwave parametric pumping can substantially improve the Q factor of dipole-exchange spin oscillations of
the thin-film cavity.
Pis’ma Zh. Tekh. Fiz. 23, 82–87 (August 26, 1997) |
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