Effect of Ru substitution for Ni on the superconductivity in MgCNi 3-xRux

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

doi:10.1103/PhysRevB.70.094511

Effect of Ru substitution for Ni on the superconductivity in MgCNi _3-xRu_x

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

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Abstract

The superconductor MgCNi₃ has been chemically doped by partial substitution of Ru for Ni in the solid solution MgCNi_3-xRu _x for 0<x<0.5. Magnetic and specific heat measurements show that the Sommerfeld parameter (γ_exp) and T_C decrease immediately on Ru substitution, but that a T_C above 2 K is maintained even for a relatively large decrease in γ_exp. Ferromagnetism is not observed to develop through Ru substitution, and the normal state magnetic susceptibility is suppressed.

Original language	English (US)
Article number	094511
Pages (from-to)	094511-1-094511-6
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	70
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevB.70.094511
State	Published - Sep 2004

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.70.094511

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title = "Effect of Ru substitution for Ni on the superconductivity in MgCNi 3-xRux",

abstract = "The superconductor MgCNi3 has been chemically doped by partial substitution of Ru for Ni in the solid solution MgCNi3-xRu x for 0exp) and TC decrease immediately on Ru substitution, but that a TC above 2 K 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.",

author = "T. Klimczuk and V. Gupta and G. Lawes and Ramirez, {A. P.} and Cava, {R. J.}",

note = "Funding Information: PRBMDO 0163-1829 10.1103/PhysRevB.66.172507 66 , 172507 ( 2002 ). This work was supported by the U.S. Department of Energy, Grant No. DE-FG02-98-ER45706 and partially by the U.S. National Science Foundation, Grants Nos. DMR 0244254 and 0213706. Work at Los Alamos National Laboratory was supported by LDRD. The work done by T.K. was graciously supported by The Foundation for Polish Science (Foreign Postdoc Fellowship Grant). ",

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AU - Gupta, V.

AU - Lawes, G.

AU - Ramirez, A. P.

AU - Cava, R. J.

N1 - Funding Information: PRBMDO 0163-1829 10.1103/PhysRevB.66.172507 66 , 172507 ( 2002 ). This work was supported by the U.S. Department of Energy, Grant No. DE-FG02-98-ER45706 and partially by the U.S. National Science Foundation, Grants Nos. DMR 0244254 and 0213706. Work at Los Alamos National Laboratory was supported by LDRD. The work done by T.K. was graciously supported by The Foundation for Polish Science (Foreign Postdoc Fellowship Grant).

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N2 - The superconductor MgCNi3 has been chemically doped by partial substitution of Ru for Ni in the solid solution MgCNi3-xRu x for 0exp) and TC decrease immediately on Ru substitution, but that a TC above 2 K 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.

AB - The superconductor MgCNi3 has been chemically doped by partial substitution of Ru for Ni in the solid solution MgCNi3-xRu x for 0exp) and TC decrease immediately on Ru substitution, but that a TC above 2 K 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.

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Effect of Ru substitution for Ni on the superconductivity in MgCNi _3-xRu_x

Abstract

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