On the importance of ferromagnetic exchange between transition metals in field-free SMMs: examples of ring-shaped hetero-trimetallic [(LnNi2){W(CN)8}]2 compounds.

Sébastien Dhers (1) , Jean- Pierre Costes (1) , Philippe Guionneau (2) , Carley Paulsen (3) , Laure Vendier (1) , Jean-Pascal Sutter (1)

1 LCC - Laboratoire de chimie de coordination
2 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux
3 NEEL - MagSup - Magnétisme et Supraconductivité

Rare cases of genuine (i.e. field-free) SMM have been found for mixed 3d-4f-5d ring-shaped compounds with Tb(iii) (Ueff/kB = 23.0 K) or Dy(iii) (Ueff/kB = 26.4 K). The ferromagnetic interactions between the transition metals are shown to play an essential role in this feature.

Domaines: Matériaux

Sébastien Dhers, Jean- Pierre Costes, Philippe Guionneau, Carley Paulsen, Laure Vendier, et al.. On the importance of ferromagnetic exchange between transition metals in field-free SMMs: examples of ring-shaped hetero-trimetallic [(LnNi2){W(CN)8}]2 compounds.. Chemical Communications, 2015, 51 (37), pp.7875-7878. ⟨10.1039/c5cc01743b⟩. ⟨hal-01149702⟩