XXIst Century Ferrites

Frederic Mazaleyrat (1) , Alexander Pasko (1) , Martino Lobue (1) , Karim Zehani (2)

1 SATIE-MME - Matériaux Magnétiques pour l'Energie
2 SATIE - Systèmes et Applications des Technologies de l'Information et de l'Energie

Ferrites have always been a subject of great interest from point of view of magnetic application, since the fist compass to present date. In contrast, the scientific interest for iron based magnetic oxides decreased after Ørsted discovery as they where replaced by coil as magnetizing sources. Neel discovery of ferrimagnetism boosted again interest and leads to strong developments during two decades before being of less interest. Recently, the evolution of power electronics toward higher frequency, the downsizing of ceramics microstucture to nanometer scale, the increasing price of rare-earth elements and the development of magnetocaloric materials put light again on ferrites. A review on three ferrite families is given herein: harder nanostructured Ba2+Fe12O19 magnet processed by spark plasma sintering, magnetocaloric effect associated to the spin transition reorientation of W-ferrite and low temperature spark plasma sintered Ni-Zn-Cu ferrites for high frequency power applications.

Domaines: Science des matériaux [cond-mat.mtrl-sci]

Frederic Mazaleyrat, Alexander Pasko, Martino Lobue, Karim Zehani. XXIst Century Ferrites. INTERNATIONAL CONFERENCE ON RECENT TRENDS IN PHYSICS (ICRTP 2012), Feb 2012, Indore, India. pp.012001, ⟨10.1088/1742-6596/365/1/012001⟩. ⟨hal-00823868⟩