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Title: Tb magnetic moment behaviour in a Gd single crystal: nuclear orientation study
Authors: Trhlik, M
Carboni, C
De Moor, Pieter
Hubalovsky, S
Kuriplach, J
Rotter, M
Severijns, Natalis
van Geert, A #
Issue Date: Aug-1998
Publisher: Iop publishing ltd
Series Title: Journal of physics-condensed matter vol:10 issue:33 pages:7467-7474
Abstract: Low-temperature nuclear orientation has been used to stud; the behaviour of the Tb magnetic moment in a Gd + 1 at.% Tb single crystal. The gamma-ray anisotropy of several Tb-160 lines was monitored in the temperature range of 5-50 mK and in the external magnetic field (B-ext) range of 0-8.5 T. The field was applied either along the a- or along the c-axis of the Gd single crystal. In the case of B-ext parallel to the a-axis the Tb magnetic moment was found to be almost aligned along B-ext even at very low fields, as expected because the hexagonal basal plane is an easy magnetization plane for the Tb ion in terbium metal. On the other hand, when B-ext is along the c-axis the Tb magnetic moment rotates very slowly towards the c-axis. Even at B-ext = 8.5 T the Tb magnetic moment is not along the direction of B-ext. This is in contrast to the fast saturation of the gadolinium ions in pure Gd. Apparently, the Tb-Gd exchange interaction is in competition with the crystal field acting on the To ion in a hexagonal lattice, our data indicates that at B-ext = 8.5 T along the c-axis the angle between the Tb magnetic moment and the applied field is of the order of 30 degrees.
ISSN: 0953-8984
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Nuclear and Radiation Physics Section
# (joint) last author

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