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- W2089351398 startingPage "A1827" @default.
- W2089351398 abstract "Three types of magnetoelastic interaction processes were studied experimentally in thin Permalloy films at $X$ band: phonon excitation by spin waves ($Mensuremath{rightarrow}P$), spin-wave excitation by phonons ($Pensuremath{rightarrow}M$) and re-excitation of spin waves by phonons which were originally produced by spin waves ($Mensuremath{rightarrow}M$). The observations were made in films with compositions varying from 77% Ni, 23% Fe to 85% Ni, 15% Fe, and in each case distinct spin-wave modes, up to $n=14$, were observed and a one-to-one correspondence between the modes of various interactions could be determined. The data were analyzed on the basis of a spatial inhomogeneity in the internal field as treated by Kooi. The attenuation of piezoelectrically generated and detected phonons by spin waves was measured and a value for the magnitude of the transverse magnetoelastic constant $|{b}_{2}|=1.5ifmmodetimeselsetexttimesfi{}{10}^{7}$ erg/${mathrm{cm}}^{3}$ was obtained for a film of 85% Ni-15% Fe. Using the measured value of ${b}^{2}$, conversion coefficients were computed for the $Mensuremath{rightarrow}P$, $Pensuremath{rightarrow}M$, and $Mensuremath{rightarrow}M$ processes. Comparison with experiment yields a discrepancy of approximately 5 dB for the $Mensuremath{rightarrow}P$ and $Pensuremath{rightarrow}M$ processes and about 15 dB for the $Mensuremath{rightarrow}M$ process for the modes $n<6$. The calculated value of the magnetoelastic constant, the mode-number dependence of the spin-wave-phonon interaction intensities for $Mensuremath{rightarrow}P$, $Pensuremath{rightarrow}M$, and $Mensuremath{rightarrow}M$, and the frequency dependence of the $Mensuremath{rightarrow}M$ process strongly favor the volume-inhomogeneity model over the surface-spin-pinning model in the measured films." @default.
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- W2089351398 date "1965-11-29" @default.
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- W2089351398 title "Coherent Spin-Wave-Phonon Interactions in Thin Magnetic Films" @default.
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- W2089351398 doi "https://doi.org/10.1103/physrev.140.a1827" @default.
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