Ferromagnetic behavior of the new hydride CeNiSnH1.8(2)

Bernard Chevalier (1) , Jean-Louis Bobet (1) , Mathieu Pasturel (1) , Ernst Bauer (2) , François Weill (1) , Rodolphe Decourt (1) , Jean Etourneau (1)

1 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux
2 Institut für Festkörperphysik

The ternary stannide CeNiSn absorbs hydrogen at 250 C under a pressure of PH2 = 5 MPa. The resulting hydride CeNiSnH1.8(2) crystallizes in the hexagonal ZrBeSi-type structure with a = 0.4392(2) nm and c = 0.8543(2) nm as unit cell parameters. Investigation by means of magnetization and electrical resistivity measurements show that (i) CeNiSnH1.8(2) exhibits a ferromagnetic order below TC = 7.0(2) K and (ii) Kondo scattering dominates the electrical properties. This study points out that hydrogenation of CeNiSn provokes a change of the ground state of cerium, from Kondo insulator to ferromagnetic behavior.

Mots clés: Ferromagnetism; Inorganci compounds; CeNiSnH1.8(2); Hydrides

Domaines: Matériaux

Bernard Chevalier, Jean-Louis Bobet, Mathieu Pasturel, Ernst Bauer, François Weill, et al.. Ferromagnetic behavior of the new hydride CeNiSnH1.8(2). Chemistry of Materials, 2003, 15 (11), pp.2181-2185. ⟨10.1021/cm0213669⟩. ⟨hal-00220513⟩