Hydrogenation inducing ferromagnetism in the ternary antiferromagnet NdCoSi.
Inorg Chem
; 49(11): 4836-42, 2010 Jun 07.
Article
en En
| MEDLINE
| ID: mdl-20429520
ABSTRACT
The hydride NdCoSiH obtained by exposure at 523 K of the ternary antiferromagnet NdCoSi under a pressure of 4 MPa of hydrogen crystallizes in the tetragonal ZrCuSiAs-type structure where H atoms occupy the tetrahedral [Nd(4)] site. The hydrogenation induces an increase in the unit cell volume close to 6%. The investigation of NdCoSiH by magnetization measurements reveals its ferromagnetic behavior below T(C) = 20.5(5) K. Neutron powder diffraction shows that the T(C) temperature is associated with a ferromagnetic arrangement of the Nd moments (2.3(2) mu(B) at 1.5 K) parallel to the c axis as observed for NdFeSi. The magnetic properties, magnetic structure, and the value of the Nd ordered magnetic moment evidenced for NdCoSiH are discussed using both band structure calculations and a comparison with the behavior of NdCoSi and NdFeSi.
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Colección:
01-internacional
Base de datos:
MEDLINE
Idioma:
En
Revista:
Inorg Chem
Año:
2010
Tipo del documento:
Article
País de afiliación:
Francia