Author: César de Julián Fernández - Istituto dei Materiali per l'Elettronica e il Magnetismo (IMEM), Consiglio Nazionale delle Ricerche (CNR)
When: June, 3rd - 12PM
Where: Salón de Actos
Abstract: The Rare-Earth crisis in 2012 constitutes the kick-off to a renewed interest on permanent magnets (PM), with the focus to develop novel rare-earth (RE) free or lean magnets. This interest is enhanced by the key role of PM in pilar technologies of the EU Green Deal, like motors for electrical mobility and wind generators. In my presentation, I will present this problem illustrating the different solutions that are being proposed, focusing on the improvement of the hard magnetic properties of ferrites at nanoscale. First, I will illustrate the possibilities of designing Co-ferrite nanoparticles to improve its magnetic anisotropy, up to get materials with properties competitive to conventional hexaferrite magnets. In addition, different examples of prototype heterostructures, like metal-oxide or oxide-oxide nanostructures based in cobalt-ferrite nanoparticles, will be shown and discussed as alternative materials for new permanent magnets. Second, I will show a broad study on the correlations between morphology and magnetic properties on a series of M-type Sr ferrite particles which size varies from nanometers to microns. The possibility of producing bulk magnets with nanomaterials will be presented.<br />\r\n<br />\r\nThis work was developed in the framework of the BEETHOVEN project (https://projectbeethoven.eu Grant Agreement 101129912) and the GREENE project (” (www.greene-project.eu), Grant Agreement N° 101129888) that have received funding from the European Union’s Horizon Europe programme . Also, this was supported by the PRIN-PNRR project HyperMag (prot. P2022RRRT4) and the National Sustainable Mobility Center CN00000023, Italian Ministry of University and Research Decree n. 1033 - 17/06/2022, Spoke 11 - Innovative Materials & Lightweighting). Both projects supported by European Union – NextGenerationEU
