Microactuator Systems Based on Epitaxial Ni-Mn-Ga Films with Magnetic Shape Memory Effect (EPITACT)

• Antragsteller: Privatdozent Dr. Sebastian Fähler; Professor Dr. Manfred Kohl
• Fachliche Zuordnung: Materialwissenschaft
• Förderung: Förderung von 2006 bis 2014
• Projektkennung: Deutsche Forschungsgemeinschaft (DFG) - Projektnummer 28340332

Bulk magnetic shape memory (MSM) alloys like Ni-Mn-Ga single crystals reach high strains up to 10 % in a moderate magnetic field. In a joint project novel integrated micro actuator systems based on MSM films are developed. This sub-project aims at the growth of epitaxial Ni-Mn-Ga films with a tailored microstructure suitable for micro actuators. Films will be released from the substrate to obtain a significant MSM effect. The influence of the deposition conditions (composition, thermal treatment, substrate, buffer, deposition rate etc.) on phase formation, microstructure (texture, grain size, defects) and the resulting magnetic / magnetoelastic properties are examined. These films are used to study the difference of the MSM effect in thin films compared to bulk.

• DFG-Verfahren: Schwerpunktprogramme
• Teilprojekt zu: SPP 1239: Änderung von Mikrostruktur und Form fester Werkstoffe durch äußere Magnetfelder
• Beteiligte Person: Professor Dr. Ludwig Schultz