Title: Magnetic Anisotropy in NpRhGa5 Single Crystals
Authors: COLINEAU ERICWASTIN FRANCKREBIZANT JEAN
Citation: JOURNAL OF PHYSICS-CONDENSED MATTER vol. 18 p. 411-419
Publisher: IOP PUBLISHING LTD
Publication Year: 2006
JRC Publication N°: JRC31770
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC31770
Type: Articles in Journals
Abstract: We have investigated oriented single crystals of the antiferromagnet NpRhGa5 (TN37 K) by means of magnetization and specific heat measurements. Strong anisotropy effects are observed: when magnetic fields are applied in the basal plane, the Néel temperature is barely affected. In contrast, in fields applied along the c axis, the second-order transition (magnetic ordering) is shifted to lower temperatures and merges into the first-order transition (reorientation of the magnetic moments). A full mapping of this complex magnetic phase diagram as a function of the temperature (down to 1.6 K), applied magnetic field (up to 9 T) and crystal orientation is presented. This study shows that antiferromagnetic order is more fragile when the magnetic field is applied along the c axis, which is similar to the situation observed for the NpCoGa5 homologue compound.
JRC Institute:Institute for Transuranium Elements

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