A magnetic study of the one dimensional Sr3NilrO6 compound

Delphine Flahaut (1) , Sylvie Hébert (1) , Antoine Maignan (1) , Vincent Hardy (1) , Christine Martin (1) , Maryvonne Hervieu (1) , M. Costes (2) , Bertrand Raquet (2) , Jean-Marc Broto (2)

1 CRISMAT - Laboratoire de cristallographie et sciences des matériaux
2 LNCMP - Laboratoire National des Champs Magnétiques Pulsés

The magnetic properties of a polycrystalline Sr3NiIrO6 sample have been investigated by means of susceptibility and magnetization measurements. On the one hand, it is found that this compound, made of magnetic chains on a triangular lattice, behaves very similarly to Ca3CoRhO6 and Ca3CoIrO6. In particular, at low temperature (T<T2 ( = 21 K)), a frozen state, characterized by a very slow spin dynamic, is evidenced. On the other hand, for T2<T<T1 (=70K), this phase exhibits magnetization values, smaller than the expected ones, with a 1/3 plateau reminiscent of the ferrimagnetic state of Ising spins on a triangular lattice. Nonetheless, the absence of saturation in 35 T and the low magnetization values are consistent with an antiferromagnetic intrachain coupling between Ir4+ (S = 1/2) and Ni2+ (S=1). Sr3NiIrO6 can be viewed as made of antiferromagnetically coupled ferrimagnetic chains on a triangular lattice. On the basis of these results, a magnetic (H, T) phase diagram is proposed.

Domaines: Supraconductivité [cond-mat.supr-con]

Delphine Flahaut, Sylvie Hébert, Antoine Maignan, Vincent Hardy, Christine Martin, et al.. A magnetic study of the one dimensional Sr3NilrO6 compound. The European Physical Journal B: Condensed Matter and Complex Systems, 2003, 35, pp.317-323. ⟨10.1140/epjb/e2003-00283-3⟩. ⟨hal-00015928⟩