Title: Pressure Effect on the Crystal Lattice of Unconventional Superconductor UCoGe
Authors: ADAMSKA A. M.HAVELA L.SURBLE S.HEATHMAN StephenPOSPISIL J.DANIS S.
Citation: JOURNAL OF PHYSICS-CONDENSED MATTER vol. 22 no. 27 p. 1-5
Publisher: IOP PUBLISHING LTD
Publication Year: 2010
JRC Publication N°: JRC59311
ISSN: 0953-8984
URI: http://iopscience.iop.org/0953-8984/22/27/275603
http://publications.jrc.ec.europa.eu/repository/handle/JRC59311
DOI: 10.1088/0953-8984/22/27/275603
Type: Articles in Journals
Abstract: High-pressure techniques were used to determine the structural behaviour of the superconducting ferromagnet UCoGe up to 30 GPa enabling us to determine the link between the effect of pressure on the materials magnetic properties and crystal structure. The TiNiSi type structure of UCoGe was preserved up to the highest pressure. The a direction, equivalent to the shortest U-U links, was identified as the critical soft direction. The data are compared with the structural variations in UCoGe ¿-hydride, which becomes non-magnetic and non-superconducting despite a volume expansion. We show that at least in this case, but probably more generally, the structure impact of hydrogenation is definitely not equivalent to negative pressure.
JRC Institute:Institute for Transuranium Elements

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