Regensburg 2019 – scientific programme

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MA: Fachverband Magnetismus

MA 15: Magnetism Poster A

MA 15.70: Poster

Tuesday, April 2, 2019, 10:00–13:00, Poster E

Structural characterization and magneto-transport properties of magnetron co-sputtered Weyl semimetal candidate Co2TiGe — •Denis Dyck¹, Andreas Becker¹, Jan Krieft¹, Anish Rai², Robin-Pierré Klett¹, Jungwoo Koo¹, Karsten Rott¹, Jan-Michael Schmalhorst¹, Tim Mewes², and Günter Reiss¹ — ¹Center for Spinelectronic Materials and Devices, Bielefeld University, Germany, Bielefeld — ²Center for Materials for Information Technology, The University of Alabama, United States of America, Tuscaloosa

Weyl semimetals theoretically promise exotic transport properties and are also interesting for spintronic devices. Thus, the research is pursued with high effort in the recent years. Implementation in real life applications requires a scalable and energy efficient approach. As a highly tunable material class, Heusler compounds are particularly interesting in this respect. Here, we investigate the Weyl semimetal candidate and transition metal based Full Heusler compound Co2TiGe. X-ray diffraction (XRD) analysis and phi scans of the magnetron co-sputtered thin films show a highly textured L21 structure of the 225 (Fm-3m) space group with a lattice constant close to the literature value. Transmission electron microscopy (TEM) confirms the crystallographic quality. The magnetic properties have been examined by magneto-optical Kerr effect (MOKE), vibrating sample magnetometry (VSM) and ferromagnetic resonance (FMR). In addition, anomalous and planar Hall effect, and tunnel magneto resistance (TMR) measurements have been carried out.