Tuning exchange and anisotropy interactions in 4f- and 5f-based intermetallic compounds

Orateur : Denis GORBUNOV (Dresden High Magnetic field Laboratory, Allemagne)

The intrinsic magnetic properties of lanthanide- and actinide-based intermetallic compounds can be understood in terms of exchange interactions and magnetocrystalline anisotropy. Especially interesting are materials featuring competing contributions to these fundamental magnetic properties, due to, e.g., multiple sublattices, geometrical frustration, or proximity to an itinerant-localized transition. Tuning of the exchange and anisotropy interactions can lead to spontaneous and field-induced phase transitions. The significance of these transitions is two-fold. Firstly, they signal boundaries between neighboring phases and make it possible to map out the rich phase diagrams of f-electron-based materials. Secondly, the transitions provide quantitative information on the fundamental magnetic properties themselves. In this talk, I will focus on several groups of compounds and show how one may tune their exchange and anisotropy interactions and extract corresponding magnetic parameters.

Télécharger dans mon agenda