Specific heat measurements on U-2(Ru1-xRhx)(3)Si-5 ternary silicides
(1998) Journal of Alloys and Compounds — Vol. 271, p. 423-425 (1998)
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- Specific heat (C) measurements have been performed on several compositions of the U-2(Ru1-xRhx)(3)Si-5 system showing an interesting magnetic phase diagram: (i) no magnetic ordering appears above 2 K for 0 less than or equal to x<0.25; (ii) on the contrary, two antiferromagnetic ranges exist, respectively, for 0.25 less than or equal to x less than or equal to 0.50 and 0.50<x less than or equal to 1.0. A defined peak seen in C/T=f(T) curve around 8.4(2) and 4.0(5) K for x=0.35 and 0.50, respectively, gives further evidence for a long-range antiferromagnetic order in the concentration range 0.25 less than or equal to x less than or equal to 0.50. Moreover, for x=0.20 (composition near the non-magnetic-->antiferromagnetic transition), a very strong enhancement of CIT is observed below 12 K, reaching a value as high as 255 mJ/U-mol K-2 at 2 K. This behaviour suggests either the occurrence of magnetic ordering below 2 K or that this silicide can be considered as the heaviest electron system. (C) 1998 Elsevier Science S.A.
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Chevalier, B., Piraux, L., Grivei, E., & Etourneau, J. (1998). Specific heat measurements on U-2(Ru1-xRhx)(3)Si-5 ternary silicides. Journal of Alloys and Compounds, 271, 423-425. https://doi.org/10.1016/S0925-8388(98)00103-0 (Original work published 1998)