Magnetic structures of some strongly correlated electron Ce-Ni-Ge systems

Laurence Durivault (1) , Françoise Bourée (2) , Bernard Chevalier (1) , Gilles André (2) , François Weill (1) , Jean Etourneau (1)

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

Extending our study on the characterisation of the magnetic properties of the ternary germanides based on cerium and nickel, we have performed magnetisation measurements and neutron powder diffraction on CeNiGe3. The antiferromagnetic structure of this compound is dependent on temperature: (i) for T between TN=5.9(2) and 5.0(2) K, the magnetic peaks are associated with the k 1=(1 0 0) propagation vector; (ii) below 5.0(2) K, the two propagation vectors k 1=(1 0 0) and k 2=(0 0.409(1) 1/2) coexist, but the intensities of the magnetic peaks corresponding to k 1 decrease with temperature below 4.1(2) K. We discuss this complex magnetic behaviour in relation to the magnetic structure reported for Ce3Ni2Ge7.

Mots clés: Neutron powder diffraction; Ternary compounds; Magnetism

Domaines: Matériaux

Laurence Durivault, Françoise Bourée, Bernard Chevalier, Gilles André, François Weill, et al.. Magnetic structures of some strongly correlated electron Ce-Ni-Ge systems. Applied physics. A, Materials science & processing, 2002, 74 (Suppl. 1), pp.S677-S679. ⟨10.1007/s003390101142⟩. ⟨hal-00818165⟩