Téléchargement | - Voir le manuscrit accepté : Neutron scattering and thermal studies of the Ni-incorporated CeSbNix system (PDF, 314 Kio)
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DOI | Trouver le DOI : https://doi.org/10.1103/PhysRevB.62.12181 |
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Auteur | Rechercher : Adroja, D. T.; Rechercher : Armitage, J. G. M.; Rechercher : Riedi, P. C.; Rechercher : Jung, M. H.; Rechercher : Tun, Z.1; Rechercher : Takabatake, T. |
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Affiliation | - Conseil national de recherches du Canada. Centre canadien de faisceaux de neutrons du CNRC
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Format | Texte, Article |
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Résumé | Neutron scattering, thermal expansion, and magnetostriction measurements have been carried out on the cubic compounds CeSbNix (x=0-0.4). Inelastic neutron scattering studies show a well-defined crystal field (CF) excitation at 4.06 (+/-0.04) meV and 5.02(+/-0.05) meV in x=0.08 and 0.15, respectively. The crystal field splitting increases with x compared with the parent compound CeSb (3.19 meV) in spite of the lattice parameter increasing with Ni incorporation. The implication is that the increase in the CF splitting in x=0.08 and 0.15 is due to a collapse of the p-f mixing between the Sb 5p holes and the localized Ce 4f electrons. The analysis of inelastic spectra of x=0.15 shows that the ground state is a doublet (Gamma7), which explains the temperature-dependent behavior of the magnetic susceptibility. Thermal expansion shows a dramatic change in behavior with Ni composition. The thermal expansion coefficient exhibits a first-order transition at 15.4 K in CeSb, which disappears for Ni composition as low as x=0.035, as well as in an applied field of 8 T. A large magnetostriction has been observed in CeSb in the magnetic-ordered state as well as in the paramagnetic state. The absolute values of the magnetostriction are reduced considerably in the Ni-incorporated alloys. The volume magnetostriction of x=0.15 alloy exhibits a scaling behavior in the paramagnetic state from which we have estimated the product of the magnetovolume coupling constant and the isothermal compressibility. |
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Date de publication | 2000-11-01 |
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Dans | |
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Langue | anglais |
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Numéro NPARC | 12328751 |
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Exporter la notice | Exporter en format RIS |
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Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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Identificateur de l’enregistrement | 33498e22-2dc0-4d77-9f9d-aab2599873ef |
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Enregistrement créé | 2009-09-10 |
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Enregistrement modifié | 2020-03-26 |
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