Dresden 2017 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
MA: Fachverband Magnetismus
MA 64: Poster 1
MA 64.19: Poster
Friday, March 24, 2017, 09:30–13:00, P2-EG
Thermoelectrical characterization of MnSi nanowires — •Alexander Fernández Scarioni1, David Schroeter2, Xiukun Hu1, Sibylle Sievers1, Dirk Menzel2, Stefan Süllow2, and Hans W. Schumacher1 — 1Physikalish-Technische Bundesanstalt (PTB), Braunschweig, Germany — 2Institut für Physik der Kondensierten Materie, TU Braunschweig, Germany
In bulk samples, the chiral magnet MnSi shows a skyrmion phase or so called A-phase in a small temperature-magnetic field range. With decreasing this A-phase expands and the *skyrmion state* becomes more stable. One way to study this A-phase has been through measurements of the Hall effect where the topological part (topological hall effect) shows evidence of the existence of the skyrmion phase in bulk and thin film MnSi.
We propose a different method to study this A-phase, using the anomalous Nernst effect (ANE), the thermoelectric analogon to the anomalous Hall effect. For this purpose we fabricated MnSi thin films using molecular beam epitaxy and then structure them down to nanowires using electron beam lithography and sputter etching. A temperature gradient is generated by a platinum microheater placed next to the MnSi nanowire. The thermoelectric voltage generated in the wire allows us to detect the average magnetization state of the wire without applying a current.
First ANE data of our MnSi nanowires in different magnetic phases will be discussed.