2026-08-08T18:43:20Z https://rodare.hzdr.de/oai2d

oai:rodare.hzdr.de:4016 2025-10-06T08:47:17Z openaire_data user-hzdr user-fwi user-matter user-rodare

true 3.1 HZDR.RODARE 10.14278/rodare.4016 Kar, Satyakam 0000-0003-1352-8026 Leibniz IFW Dresden, Institute for Metallic Materials, 01069 Dresden, Germany Nielsch, Kornelius 0000-0003-2271-7726 Leibniz IFW Dresden, Institute for Metallic Materials, 01069 Dresden, Germany Reith, Heiko 0000-0003-1662-3774 Leibniz IFW Dresden, Institute for Metallic Materials, 01069 Dresden, Germany Fähler, Sebastian 0000-0001-9450-4952 Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany Rodare 2025 Magnetic shape memory alloys Epitaxial films Microfabrication Size-effect Martensite microstructure 2025-09-30 en https://rodare.hzdr.de/record/4016 https://www.hzdr.de/publications/Publ-41911 https://www.hzdr.de/publications/Publ-41935 10.14278/rodare.4015 https://rodare.hzdr.de/communities/fwi https://rodare.hzdr.de/communities/hzdr https://rodare.hzdr.de/communities/matter https://rodare.hzdr.de/communities/rodare Creative Commons Attribution 4.0 International Open Access <p>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 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 finite size on the martensite microstructure under constrained and freestanding conditions. The 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. Our analysis reveals similarities and differences between finite size effects in ferromagnetic and ferroelastic microstructure, which is crucial for using these multifunctional materials in microsystems.</p>