We demonstrate strain tuning of magnetocrystalline anisotropy over a range of more than 1000 G in epitaxial $Y_3{\mathrm{Fe}}_5{\mathrm{O}}_{12}$ films of excellent crystalline quality grown on lattice-mismatched Y${}_3$Al${}_5{\mathrm{O}}_{12}$ 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 $Y_3{\mathrm{Fe}}_5{\mathrm{O}}_{12}$. 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 × 10${}^{14}$ Ω${}^{-1}$ m${}^{-2}$ in Pt/$Y_3{\mathrm{Fe}}_5{\mathrm{O}}_{12}$/Y${}_3$Al${}_5{\mathrm{O}}_{12}$ heterostructures, quite comparable to the value found in Pt/$Y_3{\mathrm{Fe}}_5{\mathrm{O}}_{12}$ grown on lattice-matched Gd${}_3$Ga${}_5{\mathrm{O}}_{12}$ substrates.

• Received 6 December 2013
• Revised 20 February 2014

DOI:https://doi.org/10.1103/PhysRevB.89.134404