Strain-Tunable Magnetocrystalline Anisotropy in Epitaxial Y3Fe5O12 Thin Films

Hailong Wang; Chunhui Du; Chris Hammel; Fengyuan Yang

doi:10.1103/PhysRevB.89.134404

Strain-Tunable Magnetocrystalline Anisotropy in Epitaxial Y3Fe5O12 Thin Films

Materials Science 2015-06-17 v1

Authors: Hailong Wang , Chunhui Du , Chris Hammel , Fengyuan Yang

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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.

Keywords

magnetocrystalline anisotropy strain tuning Y3Fe5O12 thin films ferromagnetic resonance spin mixing conductance inverse spin Hall effect epitaxial films

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@article{arxiv.1311.0238,
  title  = {Strain-Tunable Magnetocrystalline Anisotropy in Epitaxial Y3Fe5O12 Thin Films},
  author = {Hailong Wang and Chunhui Du and Chris Hammel and Fengyuan Yang},
  journal= {arXiv preprint arXiv:1311.0238},
  year   = {2015}
}

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17 pages, 4 figures

Strain-Tunable Magnetocrystalline Anisotropy in Epitaxial Y3Fe5O12 Thin Films

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