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SYGM: Symposium Green Magnets for Efficient Energy Conversion

SYGM 1: Green Magnets for Efficient Energy Conversion

SYGM 1.3: Hauptvortrag

Montag, 27. März 2023, 16:00–16:30, HSZ 01

Magnetic shape memory Heuslers: microstructure-related effects on the martensitic transformation — •Franca Albertini — Institute of Materials for Electronics and Magnetism (IMEM) - CNR, Parma, Italy

The vast family of magnetic shape memory Heuslers provides an extended playground of physical properties. The interplay between a martensitic transformation and magnetically ordered states gives rise to a series of functional properties that can be exploited in different technological sectors, among which solid state refrigeration, thermomagnetic generation, and robotics. Their excellent responsiveness to external fields, i.e. magnetic field, pressure and stress and their combined application, makes them promising for multifunctional exploitation. On the other hand, the hysteretic character of the martensitic transformation limits the performances of these materials in cyclic operations. In my talk I report some recent results on micro and nanoscale materials obtained by different fabrication methods, i.e. epitaxial thin films, micro/nanostructures obtained by lithographic techniques, and mechanically-milled particles. Thin films and micro/nanostructures are of particular interest not only for the realisation of miniaturised devices, but also for providing insights into the magneto-structural coupling at the different length scales. The talk will focus on microstructure tuning and microstructure-related effects on the martensitic transformation, in view of the fully exploitation of this class of materials in caloric and smart applications.