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Synthesis and resistivity measurements on URu(2)Si(2)-NpRu(2)Si(2) solid solutions are reported. U(1-x)Np(x)Ru(2)Si(2) systems, with x = 0.01, 0.1, 0.3, 0.5, 0.7 and 0.9, crystallize in the tetragonal ThCr(2)Si(2)-type structure. Resistivity measurements indicate a marked variation of the transport properties in regard to the Np substitution. For low Np dilution considerable changes are observed from the x=0 Cr-like anomaly and a Kondo like minimum appears below 10 K. In the systems for 0.3 < x < 0.7, an increase of T(N) is clearly seen and the Cr-like anomaly destroyed in favor of a strong increase of the resistivity suggesting a gap opening. At higher Np-concentration the resistivity is very similar to the pure Np compounds but a large increase of the pure Np-compound's 6 K anomaly is observed.

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Authors: WASTIN F, JRC Karlsruhe (DE);BEDNARCZYK E, JRC Karlsruhe (DE);REBIZANT J, JRC Karlsruhe (DE);ZWIRNER S, JRC Karlsruhe (DE);LANDER G H, JRC Karlsruhe (DE)
Bibliographic Reference: Paper presented: 12 International Conference on Solid Compounds of Transitional Elements, St Malo (FR), April 22-25, 1997
Availability: Available from (1) as paper EN 40460 ORA
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