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Journal Article

Anisotropic magnetothermal transport in Co2MnGa thin films

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Kriegner,  Dominik
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Markou,  Anastasios
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Felser,  Claudia
Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Ritzinger, P., Reichlova, H., Kriegner, D., Markou, A., Schlitz, R., Lammel, M., et al. (2021). Anisotropic magnetothermal transport in Co2MnGa thin films. Physical Review B, 104(9): 094406, pp. 1-11. doi:10.1103/PhysRevB.104.094406.


Cite as: https://hdl.handle.net/21.11116/0000-0009-2563-E
Abstract
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 Sigma(0) is small, which is discussed in the context of the Mott rule and of phonon drag. A further analysis of AMTP components is presented.