Magnetic ground states of the tetragonal U2Fe2Sn-type structure using an anisotropic RKKY exchange modeling

Sylvie Bourdineaud-Bordère (1) , Françoise Bourée (2) , Bernard Chevalier (1) , Jean Etourneau (1)

1 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux
2 LLB - UMR 12 - Laboratoire Léon Brillouin

In the light of numerous magnetic data obtained on the ternary compounds R2T2X (R=U, Ce; T=Ni, Rh, Pd and X=Sn, In), which crystallize in the tetragonal U2Fe2Sn-type structure (P4/mbm space group) but exhibit various magnetic structures, we demonstrate the efficiency of a Ruderman-Kittel-Kasuya-Yosida model based on a non-spherical Fermi surface to account for the magnetic interactions involved in these systems. Considering as magnetic ground states the basis vectors of the irreducible representations associated to P4/mbm space group, (4h) Wyckoff position [crystallographic site for Ce or U] and...

Mots clés: Stannides; Uranium; Magnetism; RKKY interactions; Ground states

Domaines: Matériaux

Sylvie Bourdineaud-Bordère, Françoise Bourée, Bernard Chevalier, Jean Etourneau. Magnetic ground states of the tetragonal U2Fe2Sn-type structure using an anisotropic RKKY exchange modeling. Journal of Magnetism and Magnetic Materials, 2002, 253 (1-2), pp.15-24. ⟨10.1016/S0304-8853(01)00486-3⟩. ⟨hal-00817259⟩