The effect of Fe and Ru substitution on the superconductivity in MgCNi 3

T. Klimczuk; R. J. Cava

doi:10.1016/j.ssc.2004.08.008

The effect of Fe and Ru substitution on the superconductivity in MgCNi ₃

T. Klimczuk, R. J. Cava

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

We report the effects of partial substitutions of the Villa elements: Fe (3d) and Ru (4d) in the intermetallic perovskite superconductor MgCNi ₃. In both the MgCNi_{3 -x}Ru_x and MgCNi _3-xFe_x systems, the superconducting critical temperature (T_C) decreases monotonically as x is increased. T_C decreases more slowly in the case of Ru, suggesting that the 3d electrons in Fe are magnetically pair breaking. This is supported by the normal state magnetic susceptibility measurements (Χ), which shows that Χ increases with Fe and decreases with Ru doping. No ferromagnetism is observed in either system.

Original language	English (US)
Pages (from-to)	379-382
Number of pages	4
Journal	Solid State Communications
Volume	132
Issue number	6
DOIs	https://doi.org/10.1016/j.ssc.2004.08.008
State	Published - Nov 2004

All Science Journal Classification (ASJC) codes

General Chemistry
Condensed Matter Physics
Materials Chemistry

Keywords

A. Alloys
D. Doping
D. Superconductivity

Access to Document

10.1016/j.ssc.2004.08.008

Cite this

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title = "The effect of Fe and Ru substitution on the superconductivity in MgCNi 3",

abstract = "We report the effects of partial substitutions of the Villa elements: Fe (3d) and Ru (4d) in the intermetallic perovskite superconductor MgCNi 3. In both the MgCNi3 -xRux and MgCNi 3-xFex systems, the superconducting critical temperature (TC) decreases monotonically as x is increased. TC decreases more slowly in the case of Ru, suggesting that the 3d electrons in Fe are magnetically pair breaking. This is supported by the normal state magnetic susceptibility measurements (Χ), which shows that Χ increases with Fe and decreases with Ru doping. No ferromagnetism is observed in either system.",

keywords = "A. Alloys, D. Doping, D. Superconductivity",

author = "T. Klimczuk and Cava, {R. J.}",

note = "Funding Information: This work was supported by the US Department of Energy, grant DE-FG02-98-ER45706.",

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T1 - The effect of Fe and Ru substitution on the superconductivity in MgCNi 3

AU - Klimczuk, T.

AU - Cava, R. J.

N1 - Funding Information: This work was supported by the US Department of Energy, grant DE-FG02-98-ER45706.

PY - 2004/11

Y1 - 2004/11

N2 - We report the effects of partial substitutions of the Villa elements: Fe (3d) and Ru (4d) in the intermetallic perovskite superconductor MgCNi 3. In both the MgCNi3 -xRux and MgCNi 3-xFex systems, the superconducting critical temperature (TC) decreases monotonically as x is increased. TC decreases more slowly in the case of Ru, suggesting that the 3d electrons in Fe are magnetically pair breaking. This is supported by the normal state magnetic susceptibility measurements (Χ), which shows that Χ increases with Fe and decreases with Ru doping. No ferromagnetism is observed in either system.

AB - We report the effects of partial substitutions of the Villa elements: Fe (3d) and Ru (4d) in the intermetallic perovskite superconductor MgCNi 3. In both the MgCNi3 -xRux and MgCNi 3-xFex systems, the superconducting critical temperature (TC) decreases monotonically as x is increased. TC decreases more slowly in the case of Ru, suggesting that the 3d electrons in Fe are magnetically pair breaking. This is supported by the normal state magnetic susceptibility measurements (Χ), which shows that Χ increases with Fe and decreases with Ru doping. No ferromagnetism is observed in either system.

KW - A. Alloys

KW - D. Doping

KW - D. Superconductivity

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