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Vous êtes ici : GEMACFRSéminaires et colloques

Magnetic Materials Research at BC Materials

par José Manuel Barandiaran, Professor of Applied Physics, University of the Basque Country (UPV/EHU) and Basque center for materials, applications & nanostructures (BCMaterials), Bilbao, Spain

le 11 avril 2018

Mercredi 11 avril 2018
à 11h
Bâtiment Fermat
salle 4109
45 avenue des Etats-Unis
78035 Versailles cedex

Magnetic shape memory alloys (MSMAs), such as the Heusler compound Ni2MnGa and off-stoichiometric alloys, couple the martensitic transformation (MT) with ferromagnetism, enabling outstanding effects like magnetically induced strains, up to 12%, high frequency response and large power density, of great interest for magnetic actuators. Some other MSMA, as Ni-Mn-X (X=In, Sn, Sb), also display large magneto-caloric and magneto-resistance effects, with possible applications in magnetic refrigeration, sensors, etc. A review of recent work on these alloys is presented, for bulk and single crystal as well as thin films and nanopillars. The later provide promising evidence for thermal and magnetic actuation at the nanoscale.
Search for alternatives to current available materials, which do not contain critical elements such as Rare Earths (RE), is a priority in the European Union and worldwide. Some recent results on non-RE containing compounds for high energy Permanent Magnets will be also presented. This work is part of the ongoing EU H2020 project: Novel, critical materials free, high anisotropy phases for permanent magnets, by design (NOVAMAG), lead by BCMaterials.