Dresden 2026 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MA: Fachverband Magnetismus
MA 13: Magnetic Heuslers and Semiconductors
MA 13.3: Vortrag
Montag, 9. März 2026, 15:30–15:45, POT/0361
Finite Size-Effects in Martensite Microstructure of Magnetic Shape Memory Films — Satyakam Kar1,2, Aman Singh1, Kornelius Nielsch1, Heiko Reith1, and •Sebastian Fähler3 — 1Leibniz IFW Dresden, 01069 Dresden, Germany — 2TU Dresden, Institute of Materials Science, 01062 Dresden, Germany — 3Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany
Magnetic shape memory alloys, owing to their multifunctional properties, are a promising material system for integration into microsystems. Their multifunctionality arises from the coexistence of ferroelasticity and ferromagnetism. While size-effects in ferromagnetic microstructure are well understood, corresponding experiments on the influence of finite size on the ferroelastic martensite microstructure are sparse. In this study, we use epitaxially grown Ni-Mn-Ga-based films as a model system to investigate the influence of a finite size in the martensite microstructure under constrained and freestanding conditions. Our results show that the microfabricated patterns, in both conditions, retain the characteristics of their continuous film microstructures. Film thickness has a strong influence, as this is the smallest extension investigated in our study. We analyze similarities and differences between ferromagnetic and ferroelastic microstructure, as understanding finite size effects is decisive for using these multifunctional materials in microsystems with reduced size.
Keywords: Magnetic shape memory alloys; Epitaxial films; Finite Size Effects; Martensite microstructure