Specific-heat and Cu NMR measurements have been made on the recently discovered heavy-electron compound CeCu2In. The low-temperature specific heat has an enormous electronic contribution with Ce1/T ⋍ 1.2 J/mole·K2 below 1.2 K, and shows a broad maximum at around 2.2 K. Below 2.3 K, Cu NMR linewidth ΔH shows appreciable additional broadening, and the nuclear transverse relaxation also becomes appreciably slower. These results indicate that CeCu2In undergoes an antiferromagnetic phase transition at TN ⋍ 2.3 K. The possibility of ordering of quite a small moment is suggested from the observations of the gigantic value of Ce1/T below TN, the small magnetic entropy at TN, and the steady increase of Ce1/T through TN with decreasing temperature.
ASJC Scopus subject areas
- Physics and Astronomy(all)