Regensburg 2022 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 30: Superconductivity: Poster Session

TT 30.15: Poster

Thursday, September 8, 2022, 15:00–18:00, P1

Preparation of Nb/MnSi heterostructures — •Julius Grefe¹, Rodrigo de Vasconcellos Lourenço², Markus Etzkorn^2,3, Stefan Süllow¹, and Dirk Menzel^1,3 — ¹IPKM, TU Braunschweig, Germany — ²IAP, TU Braunschweig, Germany — ³LENA, TU Braunschweig, Germany

Motivated from theoretical predictions [1], the preparation of Nb/MnSi heterostructures, which are candidates for the usage as superconducting spin valves, is introduced. The substrates are obtained by cutting oriented Triarc-Czochralski grown MnSi single crystals into thin disc-shaped wafers. The surfaces of these substrates are prepared by various polishing steps, wet chemical etching, Ar sputtering and thermal annealing. After these processes the surfaces have been investigated by AFM and TEM and show surface roughnesses in the order of 1 nm. In order to investigate proximity effects between the chiral magnet MnSi and a superconductor we have deposited onto the substrates thin Nb films using molecular beam epitaxy. These heterostructures have been investigated in terms of magnetoresistivity measurements.

[1] N. G. Pugach et al., Appl. Phys. Lett. 111, 162601 (2017)