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Magnetic and electrical transport properties of a new compound, NpNiSn, crystallizing in the orthorhombic structure of the TiNizi-type with parameters a, b and c of 722.8(2), 447.7(1) and 757.1(2) pm, respectively, are reported. NpNiSn orders antiferrpmagnetically below Tn=37 K. The antiferromagnetic order is not affected by a field up to 9 T. Our data indicate a Np3+ charge state for the Np ion and a possible heavy-fermion character of this compound.

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Authors: JAVORSKY P, Charles University of Prague (CZ);HAVELA L, Charles University of Prague (CZ);WASTIN F, Institute for Transuranium Elements (DE);GRIVEAU J C, Institute for Transuranium Elements (DE);BEDNARCZYK E, Institute for Transuranium Elements (DE);REBIZANT J, Institute for Transuranium Elements (DE);SANCHEZ J P, CEA Grenoble (FR);VUILLET P, CEA Grenoble (FR)
Bibliographic Reference: Article: Journal of Alloys and Compounds, 1998
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