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.
Originalsprache | Englisch |
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Seiten (von - bis) | 467-472 |
Seitenumfang | 6 |
Fachzeitschrift | Materials Science Forum |
Jahrgang | 166-169 |
Ausgabenummer | pt 2 |
Publikationsstatus | Veröffentlicht - 1994 |
Extern publiziert | Ja |
Veranstaltung | Proceedings of the 3rd European Powder Diffraction Conference. Part 2 (of 2) - Vienna, Austria Dauer: 25 Sep. 1993 → 28 Sep. 1993 |