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Anisotropic magnetothermal transport in Co2MnGa thin films

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2021

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Ritzinger, Philipp
Reichlova, Helena
Kriegner, Dominik
Markou, Anastasios
Schlitz, Richard
Scheffler, Daniel
Park, Gyu Hyeon
Thomas, Andy
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Physical Review B. American Physical Society (APS). 2021, 104(9), 094406. ISSN 2469-9950. eISSN 2469-9969. Available under: doi: 10.1103/PhysRevB.104.094406

Zusammenfassung

Ferromagnetic Co2MnGa has recently attracted significant attention due to effects related to the nontrivial topology of its band structure. However, a systematic study of canonical magnetogalvanic transport effects is missing. Focusing on high quality thin films, here we systematically measure anisotropic magnetoresistance (AMR) and its thermoelectric counterpart anisotropic magnetothermopower (AMTP). We model the AMR data by free energy minimization within the Stoner-Wohlfarth formalism and conclude that both crystalline and noncrystalline components of this magnetotransport phenomenon are present in Co2MnGa. The AMTP is, in comparison to the AMR, large in relative terms, since the Seebeck coefficient Σ0 is small, which is discussed in the context of the Mott rule and of phonon drag. A further analysis of AMTP components is presented.

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ISO 690RITZINGER, Philipp, Helena REICHLOVA, Dominik KRIEGNER, Anastasios MARKOU, Richard SCHLITZ, Michaela LAMMEL, Daniel SCHEFFLER, Gyu Hyeon PARK, Andy THOMAS, Sebastian T. B. GOENNENWEIN, 2021. Anisotropic magnetothermal transport in Co2MnGa thin films. In: Physical Review B. American Physical Society (APS). 2021, 104(9), 094406. ISSN 2469-9950. eISSN 2469-9969. Available under: doi: 10.1103/PhysRevB.104.094406
BibTex
@article{Ritzinger2021Aniso-55001,
  year={2021},
  doi={10.1103/PhysRevB.104.094406},
  title={Anisotropic magnetothermal transport in Co<sub>2</sub>MnGa thin films},
  number={9},
  volume={104},
  issn={2469-9950},
  journal={Physical Review B},
  author={Ritzinger, Philipp and Reichlova, Helena and Kriegner, Dominik and Markou, Anastasios and Schlitz, Richard and Lammel, Michaela and Scheffler, Daniel and Park, Gyu Hyeon and Thomas, Andy and Goennenwein, Sebastian T. B.},
  note={Article Number: 094406}
}
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