A structural, magnetic, and Mössbauer spectral study of the TbCo4-xFexB compounds with x=0, 1, and 2 - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Journal of Applied Physics Année : 2009

A structural, magnetic, and Mössbauer spectral study of the TbCo4-xFexB compounds with x=0, 1, and 2

Résumé

The TbCo4-xFexB compounds with x=0, 1, and 2 have been investigated by x-ray and neutron diffraction, magnetic measurements, and iron-57 Mössbauer spectroscopy. The substitution of cobalt by iron induces both an anisotropic increase in the unit-cell volume and a large increase of approximately 250 K in the Curie temperature; the 4.2 K magnetization decreases continuously with increasing iron content. The powder neutron diffraction patterns and the Mössbauer spectra of the TbCo4-xFexB compounds reveal a strong preferential substitution of iron for cobalt on the 2c site, small transition metal magnetic moments of approximately 1.7μB, and small iron hyperfine fields of approximately 16 T. The compensation temperature of the TbCo4-xFexB compounds decreases continuously from 400 to 350 K between x=0 and 2 as the result of an iron induced increase in the transition metal magnetization. The magnetic moment and hyperfine field are found to be larger on the 2c site than on the 6i site, a difference that reflects the strong hybridization of the 3d orbitals of the 6i site transition metal with the boron 2p orbitals.
Fichier principal
Vignette du fichier
TbCo4-xFexB-JAP-105_2009_113908.pdf (705.95 Ko) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

hal-00983990 , version 1 (26-04-2014)

Identifiants

Citer

Hervé Mayot, Olivier Isnard, Fernande Grandjean, Gary J. Long. A structural, magnetic, and Mössbauer spectral study of the TbCo4-xFexB compounds with x=0, 1, and 2. Journal of Applied Physics, 2009, 105, pp.3908. ⟨10.1063/1.3138808⟩. ⟨hal-00983990⟩

Collections

UGA CNRS NEEL
314 Consultations
205 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More