Stray-Field-Induced Actuation of Free-Standing Magnetic Shape-Memory Films

摘要

Magnetic shape-memory (MSM) alloys, such as NiMnGa, reach maximum strains of close to 10% in single crystals. This exceeds the strain obtainable from piezoelectric or magnetos-trictive materials, currently used in actuators, by more than one order of magnitude, and opens new opportunities for applications. Advanced materials have been developed based on new compositions or on innovative routes of fabrication resulting in foams, fibers, textured poly crystals, or composites.