Hardening of Cobalt Ferrite Nanoparticles by Local Crystal Strain Release: Implications for Rare Earth Free Magnets
Beatrice Muzzi, Elisabetta Lottini, Nader Yaacoub, Davide Peddis, Giovanni Bertoni, César de Julián Fernández, Claudio Sangregorio, Alberto López‐Ortega
Abstract
> 350 °C) performed on a dried powder does not allow the release of the lattice stress, leading to the reduction of the initial coercive field. The strategy here proposed, therefore, constitutes a method to improve the magnetic properties of nanoparticles, which can be particularly appealing for those materials, as is the case of cobalt ferrite, currently investigated as building blocks for the development of rare-earth free permanent magnets.
Topics & Concepts
CoercivityMaterials scienceAnnealing (glass)RemanenceNanoparticleMagnetMagnetic nanoparticlesChemical engineeringComposite materialNuclear magnetic resonanceNanotechnologyMagnetizationCondensed matter physicsMagnetic fieldMechanical engineeringEngineeringQuantum mechanicsPhysicsMagnetic Properties and Synthesis of FerritesMagnetic properties of thin filmsElectromagnetic wave absorption materials