Magnetocrystalline anisotropies in MnxPtSn thin films

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2021
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Swekis, Peter
Markou, Anastasios
Sichelschmidt, Jörg
Felser, Claudia
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APL Materials. American Institute of Physics (AIP). 2021, 9, 051104. eISSN 2166-532X. Available under: doi: 10.1063/5.0049891
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The magnetic anisotropy determines the equilibrium orientation of the magnetization in a ferromagnet. In Mn-based inverse tetragonal Heusler compounds, a large uniaxial anisotropy makes these materials excellent candidates for both spin-transfer-torque and skyrmionic devices. Here, we present systematic investigations of the magnetocrystalline anisotropies in MnxPtSn films (x = 1.0–1.6). We find that the MnxPtSn films, grown by magnetron sputtering on MgO substrates, show a structural transition between x = 1.0 and 1.2 from cubic to tetragonal, where the tetragonal structure shows a twinned in-plane c-axis orientation. From ferromagnetic resonance measurements, we determine the out-of-plane and in-plane uniaxial anisotropies, taking into account the particular structural properties of the films. We find a strong dependence of the uniaxial anisotropies on the Mn concentration, as well as on structural distortions due to the lattice-matched growth. From temperature-dependent ferromagnetic resonance measurements, we infer the evolution of the in-plane uniaxial anisotropy and observe the presence of additional magnetic interactions and magnetization relaxation mechanisms around the spin reorientation transition.

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ISO 690SWEKIS, Peter, Anastasios MARKOU, Jörg SICHELSCHMIDT, Claudia FELSER, Sebastian T. B. GOENNENWEIN, 2021. Magnetocrystalline anisotropies in MnxPtSn thin films. In: APL Materials. American Institute of Physics (AIP). 2021, 9, 051104. eISSN 2166-532X. Available under: doi: 10.1063/5.0049891
BibTex
@article{Swekis2021Magne-53711,
  year={2021},
  doi={10.1063/5.0049891},
  title={Magnetocrystalline anisotropies in MnxPtSn thin films},
  volume={9},
  journal={APL Materials},
  author={Swekis, Peter and Markou, Anastasios and Sichelschmidt, Jörg and Felser, Claudia and Goennenwein, Sebastian T. B.},
  note={Article Number: 051104}
}
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