Effect of Ru substitution for Ni on the superconductivity in MgCNi3−xRux

T. Klimczuk; V. Gupta; G. Lawes; A. P. Ramirez; R. J. Cava

doi:10.1103/PhysRevB.70.094511

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Effect of Ru substitution for Ni on the superconductivity in MgCNi3−xRux

T. Klimczuk, V. Gupta, G. Lawes, A. P. Ramirez, R. J. Cava

DOI 10.1103/PhysRevB.70.094511 · Physical Review B

T1

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Abstract

The superconductor MgCNi3 has been chemically doped by partial substitution of Ru for Ni in the solid solution MgCNi3−xRux for 0<x<0.5. Magnetic and specific heat measurements show that the Sommerfeld parameter (γexp) and TC decrease immediately on Ru substitution, but that a TC above 2K is maintained even for a relatively large decrease in γexp. Ferromagnetism is not observed to develop through Ru substitution, and the normal state magnetic susceptibility is suppressed.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
MgCNi3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	7	Pressure not reported	onset
MgCNi3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	5.7	Pressure not reported	onset
MgCNi3-xRux Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	2	Pressure not reported	unknown