Magnetic and Electronic Properties of Weyl Semimetal Co2MnGa Thin Films
| Autor: | Claudia Felser, V. Ukleev, Anastasios Markou, Peter Swekis, Andrei Gloskovskii, Yi-Cheng Chen, Ioannis Panagiotopoulos, Jörg Sichelschmidt, Anton Devishvili, Sebastian T. B. Goennenwein, Dmytro S. Inosov, Aleksandr S. Sukhanov, Alexei Vorobiev, Gerhard H. Fecher |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
General Chemical Engineering photoelectron spectroscopy Weyl semimetal 02 engineering and technology engineering.material polarized neutron reflectivity magnetic Weyl semimetals 01 natural sciences Article lcsh:Chemistry Magnetization Condensed Matter::Materials Science 0103 physical sciences ddc:530 General Materials Science 010306 general physics topological materials magnetic anisotropy Magnetic moment Spintronics Spin polarization Condensed matter physics Heusler compounds magnetic dichroism ferromagnetic resonance thin films 021001 nanoscience & nanotechnology Heusler compound Condensed Matter Physics Ferromagnetic resonance Magnetic anisotropy lcsh:QD1-999 ddc:540 engineering 0210 nano-technology Den kondenserade materiens fysik |
| Zdroj: | Nanomaterials Nanomaterials, Vol 11, Iss 251, p 251 (2021) Volume 11 Issue 1 Nanomaterials 11(1), 251 (2021). doi:10.3390/nano11010251 'Nanomaterials ', vol: 11, pages: 251-1-251-14 (2021) |
| DOI: | 10.3390/nano11010251 |
| Popis: | Nanomaterials 11(1), 251 (2021). doi:10.3390/nano11010251 Magnetic Weyl semimetals are newly discovered quantum materials with the potential for use in spintronic applications. Of particular interest is the cubic Heusler compound Co$_{2}$MnGa due to its inherent magnetic and topological properties. This work presents the structural, magnetic and electronic properties of magnetron co-sputtered Co$_{2}$MnGa thin films, with thicknesses ranging from 10 to 80 nm. Polarized neutron reflectometry confirmed a uniform magnetization through the films. Hard x-ray photoelectron spectroscopy revealed a high degree of spin polarization and localized (itinerant) character of the Mn d (Co d) valence electrons and accompanying magnetic moments. Further, broadband and field orientation-dependent ferromagnetic resonance measurements indicated a relation between the thickness-dependent structural and magnetic properties. The increase of the tensile strain-induced tetragonal distortion in the thinner films was reflected in an increase of the cubic anisotropy term and a decrease of the perpendicular uniaxial term. The lattice distortion led to a reduction of the Gilbert damping parameter and the thickness-dependent film quality affected the inhomogeneous linewidth broadening. These experimental findings will enrich the understanding of the electronic and magnetic properties of magnetic Weyl semimetal thin films Published by MDPI, Basel |
| Databáze: | OpenAIRE |
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