Magnetic and electronic properties of weyl semimetal Co2MnGa thin films

Swekis P, Sukhanov AS, Chen YC, Gloskovskii A, Fecher GH, Panagiotopoulos I, Sichelschmidt J, Ukleev V, Devishvili A, Vorobiev A, Inosov DS, Goennenwein STB, Felser C, Markou A (2021)

Publication Type: Journal article

Publication year: 2021

Journal

Nanomaterials MDPI

Book Volume: 11

Pages Range: 1-14

Article Number: 251

Journal Issue: 1

DOI: 10.3390/nano11010251

Abstract

Magnetic Weyl semimetals are newly discovered quantum materials with the potential for use in spintronic applications. Of particular interest is the cubic Heusler compound Co2MnGa due to its inherent magnetic and topological properties. This work presents the structural, magnetic and electronic properties of magnetron co-sputtered Co2MnGa 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. Fur-ther, 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.

Involved external institutions

Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids DE Germany (DE) Deutsches Elektronen-Synchrotron DESY DE Germany (DE) University of Ioannina / Πανεπιστήμιο Ιωαννίνων GR Greece (GR) Paul Scherrer Institute (PSI) CH Switzerland (CH) Institute Laue-Langevin (ILL) FR France (FR) Uppsala University SE Sweden (SE) Technische Universität Dresden DE Germany (DE)

How to cite

APA:

Swekis, P., Sukhanov, A.S., Chen, Y.-C., Gloskovskii, A., Fecher, G.H., Panagiotopoulos, I.,... Markou, A. (2021). Magnetic and electronic properties of weyl semimetal Co2MnGa thin films. Nanomaterials, 11(1), 1-14. https://doi.org/10.3390/nano11010251

MLA:

Swekis, Peter, et al. "Magnetic and electronic properties of weyl semimetal Co2MnGa thin films." Nanomaterials 11.1 (2021): 1-14.

BibTeX: Download