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On exchange coupling and bonding in the Gd2@C80 and Gd2@C79N endohedral dimetallo-fullerenes

Cimpoesu, Fanica ; Frecus, Bogdan ; Oprea, Corneliu I. ; Ramanantoanina, Harry ; Urland, Werner ; Daul, Claude

In: Molecular Physics, 2015, vol. 113, no. 13-14, p. 1712-1727

A series of computational experiments performed with various methods belonging to wave-function and density functional theories approaches the issue of bonding regime and exchange coupling in the title compounds. Gd₂@C₈₀ is computed with a very weak exchange coupling, the sign depending on the method, while Gd₂@C₇₉N has resulted with a strong coupling and ferromagnetic ground...