Anisotropic thermal expansion in RECu2-compounds

A. Lindbaum, E. Gratz, M. Rotter

Research output: Contribution to journalConference articlepeer-review

Abstract

The lattice parameters a, b and c of TmCu2, GdCu2 and YCu2 have been measured in the temperature range from 4.2 K up to 300 K using X-ray powder diffraction. The influence of the crystal field on the thermal expansion in TmCu2 in the paramagnetic region (TmCu2 orders magnetically at TN = 6.3 K) has been determined by comparing the thermal expansion of the nonmagnetic YCu2 with that of TmCu2 . The data thus obtained are compared with a theoretical model given in Gratz et. al. 1993 using a set of crystal field parameters published by Gabbiness et al. 1992. GdCu2, for which the influence of the crystal field can be neglected (Gd3+ : L = 0), has also been investigated in order to study the influence of the exchange interaction below the magnetic ordering temperature of 42K.

Original languageEnglish
Pages (from-to)467-472
Number of pages6
JournalMaterials Science Forum
Volume166-169
Issue numberpt 2
Publication statusPublished - 1994
Externally publishedYes
EventProceedings of the 3rd European Powder Diffraction Conference. Part 2 (of 2) - Vienna, Austria
Duration: 25 Sep 199328 Sep 1993

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