Abstract:The threshold microwave-field amplitude h.rl t required for the unstable growth of spin waves has been investigated for oblique pumping with a linearly polarized microwave field applied at an arbitrary angle with respect to the static magnetic field. The experiment was performed on YIG (1% Dy) spheres at 9.2 GHz, using a rectangular TE102 cavity and a pulsed magnetron source. Data were obtained at static external fields of 400, 600, 1100, and 1500 Oe. In general, herit increases with the pump angle. Theoretica… Show more
“…In the absence of any quantitative description of the domain structure, the treatment will be primarily qualitative. Domain structure considerations have previously been invoked [5] to qualitatively account for the dependence of herit on the pump angle between h and H o for partially ma.gnetized spherical samples. Domain structure considerations may also be invoked to account for the threshold field behavior below saturation for the thin-disk data summarized in Figs.…”
Section: Thresholds For Partiably Magnetized Sanzplesmentioning
“…In the absence of any quantitative description of the domain structure, the treatment will be primarily qualitative. Domain structure considerations have previously been invoked [5] to qualitatively account for the dependence of herit on the pump angle between h and H o for partially ma.gnetized spherical samples. Domain structure considerations may also be invoked to account for the threshold field behavior below saturation for the thin-disk data summarized in Figs.…”
Section: Thresholds For Partiably Magnetized Sanzplesmentioning
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