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- W2007447600 abstract "The 9.4 GHz parallel pump microwave threshold field (hcrit) has been measured at 293°K for polycrystalline YIG and YA1IG spherical samples containing Ho3+, Dy3+, Ce3+, and Gd3+ singly or in combination. Low wave number spin-wave linewidths (ΔHk→0) were determined by adjusting the dc magnetic field to obtain a threshold field corresponding to the butterfly minimum. The experimental results justify a technical modification of the parallel pump instability equation from: hcrit = ΔHk→0ωp/ωm, to: hcrit = (ΣREΔHREk→0 + ΔHik→0) ωp/ωm, where ΔHik→0 is the intrinsic spin-wave linewidth of YIG and aluminum-substituted YIG, and ΔHREk→0 = E. NRE/4πMs is the effective spin-wave linewidth of each type of rare-earth ion present. ΔHREk→0 is directly proportional to the rare-earth ion concentration (NRE), and inversely proportional to the magnetization of the host material. E is a parameter of the constituent rare-earth ion which, for small doping levels, remains constant. Of major interest is the increased effect of a given NRE on the threshold field as the magnetization of the host material is reduced." @default.
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- W2007447600 date "1971-03-15" @default.
- W2007447600 modified "2023-09-27" @default.
- W2007447600 title "Effect of Rare‐Earth and Aluminum Ions on the High‐Power Threshold of YIG" @default.
- W2007447600 cites W2072842384 @default.
- W2007447600 doi "https://doi.org/10.1063/1.1660415" @default.
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