Crystal and magnetic structure of a novel compound UCu5Al. Structural stability with Th-substitution

Authors
Troc, R Tran, VH Wolcyrz, M Andre, G Bouree, F
Citation
R. Troc et al., Crystal and magnetic structure of a novel compound UCu5Al. Structural stability with Th-substitution, J MAGN MAGN, 190(3), 1998, pp. 251-256
Citations number
5
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
ISSN journal
03048853 → ACNP
Volume
190
Issue
3
Year of publication
1998
Pages
251 - 256
Database
ISI
SICI code
0304-8853(199812)190:3<251:CAMSOA>2.0.ZU;2-7
Abstract
The antiferromagnetically ordered, moderate heavy fermion UCu5Al, crystalli ses in the original tetragonal I4/mmm structure, which remains unchanged in the U1 - xThxCu5Al solid solutions up to x approximate to 0.35. Above this composition, other solid solutions with general chemical formula (U1 - xTh x)(Cu1 - yAly)(5) are formed, having a different type of structure, namely the hexagonal CaCu5-type. Below T-N = 18 K UCu5Al orders with a sine-modula ted, incommensurate magnetic structure described by a wave vector k = (0, 0 , 0.55) and the moment amplitude of 1.45(5) mu(B) at 1.4 K. (C) 1998 Elsevi er Science B.V. All rights reserved.