Local inhomogeneities enable phase-dependent non-adiabatic parametric amplification of propagating spin waves in YIG nanostructures via momentum scattering, as shown by micromagnetic simulations and Brillouin light scattering experiments.
Strain-Tunable Magnetocrystalline Anisotropy in Epitaxial Y3Fe5O12 Thin Films
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abstract
We demonstrate strain-tuning of magnetocrystalline anisotropy over a range of more than one thousand Gauss in epitaxial Y3Fe5O12 films of excellent crystalline quality grown on lattice-mismatched Y3Al5O12 substrates. Ferromagnetic resonance (FMR) measurements reveal a linear dependence of both out-of-plane and in-plane uniaxial anisotropy on the strain-induced tetragonal distortion of Y3Fe5O12. Importantly, we find the spin mixing conductance G_r determined from inverse spin Hall effect and FMR linewidth broadening remains large: G_r = 3.33 x 10^14 Ohm^-1m^-2 in Pt/Y3Fe5O12/Y3Al5O12 heterostructures, quite comparable to the value found in Pt/Y3Fe5O12 grown on lattice-matched Gd3Ga5O12 substrates.
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Phase-dependent parametric amplification of propagating spin waves in YIG nanostructures enabled by local inhomogeneities
Local inhomogeneities enable phase-dependent non-adiabatic parametric amplification of propagating spin waves in YIG nanostructures via momentum scattering, as shown by micromagnetic simulations and Brillouin light scattering experiments.