The suppression of superconductivity in MgCNi3 by Ni-site doping

M. A. Hayward; M. K. Haas; A. P. Ramirez; T. He; K. A. Regan; N. Rogado; K. Inumaru; R. J. Cava

doi:10.1016/S0038-1098(01)00303-9

The suppression of superconductivity in MgCNi₃ by Ni-site doping

M. A. Hayward, M. K. Haas, A. P. Ramirez, T. He, K. A. Regan, N. Rogado, K. Inumaru, R. J. Cava

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

65 Scopus citations

Abstract

The effects of partial substitution of Cu and Co for Ni in the intermetallic perovskite superconductor MgCNi₃ are reported. Calculation of the expected electronic density of states suggests that electron (Cu) and hole (Co) doping should have different effects. For MgCNi_3-xCu_x, solubility of Cu is limited to approximately 3% (x = 0.1). and T_c decreases systematically from 7 to 6 K. For MgCNi_3-xCo_x, solubility of Co is much more extensive, but bulk superconductivity disappears for Co doping of 1% (x = 0.03). No signature of long range magnetic ordering is observed in the magnetic susceptibility of the Co doped material.

Original language	English (US)
Pages (from-to)	491-495
Number of pages	5
Journal	Solid State Communications
Volume	119
Issue number	8-9
DOIs	https://doi.org/10.1016/S0038-1098(01)00303-9
State	Published - Aug 21 2001

All Science Journal Classification (ASJC) codes

General Chemistry
Condensed Matter Physics
Materials Chemistry

Keywords

A. Metals
A. Superconductors
D. Electronic band structure

Access to Document

10.1016/S0038-1098(01)00303-9

Cite this

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title = "The suppression of superconductivity in MgCNi3 by Ni-site doping",

abstract = "The effects of partial substitution of Cu and Co for Ni in the intermetallic perovskite superconductor MgCNi3 are reported. Calculation of the expected electronic density of states suggests that electron (Cu) and hole (Co) doping should have different effects. For MgCNi3-xCux, solubility of Cu is limited to approximately 3% (x = 0.1). and Tc decreases systematically from 7 to 6 K. For MgCNi3-xCox, solubility of Co is much more extensive, but bulk superconductivity disappears for Co doping of 1% (x = 0.03). No signature of long range magnetic ordering is observed in the magnetic susceptibility of the Co doped material.",

keywords = "A. Metals, A. Superconductors, D. Electronic band structure",

author = "Hayward, {M. A.} and Haas, {M. K.} and Ramirez, {A. P.} and T. He and Regan, {K. A.} and N. Rogado and K. Inumaru and Cava, {R. J.}",

note = "Funding Information: The work at Princeton was supported by the National Science Foundation Division of Materials Research and the Department of Energy, Division of Basic Energy Sciences. ",

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T1 - The suppression of superconductivity in MgCNi3 by Ni-site doping

AU - Hayward, M. A.

AU - Haas, M. K.

AU - Ramirez, A. P.

AU - He, T.

AU - Regan, K. A.

AU - Rogado, N.

AU - Inumaru, K.

AU - Cava, R. J.

N1 - Funding Information: The work at Princeton was supported by the National Science Foundation Division of Materials Research and the Department of Energy, Division of Basic Energy Sciences.

PY - 2001/8/21

Y1 - 2001/8/21

N2 - The effects of partial substitution of Cu and Co for Ni in the intermetallic perovskite superconductor MgCNi3 are reported. Calculation of the expected electronic density of states suggests that electron (Cu) and hole (Co) doping should have different effects. For MgCNi3-xCux, solubility of Cu is limited to approximately 3% (x = 0.1). and Tc decreases systematically from 7 to 6 K. For MgCNi3-xCox, solubility of Co is much more extensive, but bulk superconductivity disappears for Co doping of 1% (x = 0.03). No signature of long range magnetic ordering is observed in the magnetic susceptibility of the Co doped material.

AB - The effects of partial substitution of Cu and Co for Ni in the intermetallic perovskite superconductor MgCNi3 are reported. Calculation of the expected electronic density of states suggests that electron (Cu) and hole (Co) doping should have different effects. For MgCNi3-xCux, solubility of Cu is limited to approximately 3% (x = 0.1). and Tc decreases systematically from 7 to 6 K. For MgCNi3-xCox, solubility of Co is much more extensive, but bulk superconductivity disappears for Co doping of 1% (x = 0.03). No signature of long range magnetic ordering is observed in the magnetic susceptibility of the Co doped material.

KW - A. Metals

KW - A. Superconductors

KW - D. Electronic band structure

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VL - 119

SP - 491

EP - 495

JO - Solid State Communications

JF - Solid State Communications

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