Magnetic and electrical properties of several equiatomic ternary U-compounds

T. T.M. Palstra*, G. J. Nieuwenhuys, R. F.M. Vlastuin, J. van den Berg, J. A. Mydosh, K. H.J. Buschow

*Corresponding author for this work

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Abstract

Magnetisation, specific heat, electrical resistivity, magnetoresistivity and Hall effect were measured for several equiatomic ternary (1-1-1) intermetallic compounds of formula RTX with R = U, Th, Hf and Ti, T a transition metal (Co, Ni, Ru, Rh, Pd, Ir, Pt and Au), and X = Al, Ga, Sn and Sb. These compounds crystallize in three different crystal structures: the cubic MgAgAs-type, and the hexagonal Fe2P- and CaIn2-types. All U-compounds, which we focus upon in this paper, exhibit magnetic moments of about 3μB/U at high temperature and encompass U-U distances from 3.51 to 4.68 Å. For the compounds which the largest U-U distances, Kondo-lattice behaviour was observed. The specific heat coefficient γ shows typical metallic values with some enhancement. Remarkably these compounds have an electrical resistivity up to three orders of magnitude larger than that expected and usually found for U-based intermetallic compounds. The Hf- and Th-based compounds serve as nonmagnetic reference materials, however, they also exhibit anomalously larger resistivities.

Original languageEnglish
Pages (from-to)331-342
Number of pages12
JournalJournal of magnetism and magnetic materials
Volume67
Issue number3
DOIs
Publication statusPublished - 1 Jan 1987
Externally publishedYes

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Palstra, T. T. M., Nieuwenhuys, G. J., Vlastuin, R. F. M., van den Berg, J., Mydosh, J. A., & Buschow, K. H. J. (1987). Magnetic and electrical properties of several equiatomic ternary U-compounds. Journal of magnetism and magnetic materials, 67(3), 331-342. https://doi.org/10.1016/0304-8853(87)90192-2