Synthesis, Crystal Structure, and Magnetic Properties of UFe₅Sn

Authors: Gonçalves A.P.¹; Godinho M.²; Noël H.³

Source: Journal of Solid State Chemistry, Volume 154, Number 2, November 2000 , pp. 551-556(6)

Publisher: Academic Press

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Abstract:

The UFe₅Sn compound was synthesized by arc melting, followed by annealing at 800°C. The crystal structure was determined by single-crystal X-ray diffraction and refined to a residual value of R=0.035 (R_w=0.031). This compound crystallizes in the orthorhombic CeCu₅Au-type structure, space group Pnma, with lattice parameters a=8.082(3) Å, b=4.869(1) Å, and c=10.448(3) Å. Magnetization measurements were performed in the 5–300 K temperature range and under fields up to 5.5 T. The results indicate a weak ferromagnetic behavior at room temperature. Two magnetic anomalies are observed at 248 and 180 K, respectively, and the ferromagnetic character strongly increases below the highest temperature anomaly. Copyright 2000 Academic Press.

Keywords: UFe₅Sn; uranium intermetallic; magnetic intermetallic; CeCu₅Au-type structure.

Language: English

Document Type: Research article

Affiliations: 1: Departamento de Química, Instituto Tecnológico e Nuclear, Sacavém, P-2686-953, Portugal 2: Departamento de Física, Faculdade de Ciências, Universidade de Lisboa, Campo Grande ed. C1, Lisboa, P-1700, Portugal 3: Laboratoire de Chimie du Solide et Inorganique Moléculaire, UMR CNRS 6511, Université de Rennes 1, Avenue de Général Leclerc, Rennes, 35042, France