Influence of iridium doping in MgB2 superconducting wires

Jean-Claude Grivel*

*Corresponding author for this work

Research output: Contribution to journal › Journal article › Research › peer-review

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Abstract

MgB2 wires with iridium doping were manufactured using the in-situ technique in a composite Cu-Nb sheath. Reaction was performed at 700°C, 800°C or 900°C for 1h in argon atmosphere. A maximum of about 1.5 at.% Ir replaces Mg in MgB2. The superconducting transition temperature is slightly lowered by Ir doping. The formation of IrMg3 and IrMg4 secondary phase particles is evidenced, especially for a nominal stoichiometry with 2.0 at.% Ir doping. The critical current density and accommodation field of the wires are strongly dependent on the Ir content and are generally weakened in the presence of Ir, although the effect is less pronounced at lower temperatures.
Original languageEnglish
JournalPhysica C: Superconductivity and its Applications
Volume547
Pages (from-to)7-15
ISSN0921-4534
DOIs
Publication statusPublished - 2018

Cite this

Grivel, Jean-Claude. / Influence of iridium doping in MgB2 superconducting wires. In: Physica C: Superconductivity and its Applications. 2018 ; Vol. 547. pp. 7-15.
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title = "Influence of iridium doping in MgB2 superconducting wires",
abstract = "MgB2 wires with iridium doping were manufactured using the in-situ technique in a composite Cu-Nb sheath. Reaction was performed at 700°C, 800°C or 900°C for 1h in argon atmosphere. A maximum of about 1.5 at.{\%} Ir replaces Mg in MgB2. The superconducting transition temperature is slightly lowered by Ir doping. The formation of IrMg3 and IrMg4 secondary phase particles is evidenced, especially for a nominal stoichiometry with 2.0 at.{\%} Ir doping. The critical current density and accommodation field of the wires are strongly dependent on the Ir content and are generally weakened in the presence of Ir, although the effect is less pronounced at lower temperatures.",
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Grivel, J-C 2018, 'Influence of iridium doping in MgB2 superconducting wires', Physica C: Superconductivity and its Applications, vol. 547, pp. 7-15. https://doi.org/10.1016/j.physc.2018.01.002

Influence of iridium doping in MgB2 superconducting wires. / Grivel, Jean-Claude.

In: Physica C: Superconductivity and its Applications, Vol. 547, 2018, p. 7-15.

Research output: Contribution to journal › Journal article › Research › peer-review

TY - JOUR

T1 - Influence of iridium doping in MgB2 superconducting wires

AU - Grivel, Jean-Claude

PY - 2018

Y1 - 2018

N2 - MgB2 wires with iridium doping were manufactured using the in-situ technique in a composite Cu-Nb sheath. Reaction was performed at 700°C, 800°C or 900°C for 1h in argon atmosphere. A maximum of about 1.5 at.% Ir replaces Mg in MgB2. The superconducting transition temperature is slightly lowered by Ir doping. The formation of IrMg3 and IrMg4 secondary phase particles is evidenced, especially for a nominal stoichiometry with 2.0 at.% Ir doping. The critical current density and accommodation field of the wires are strongly dependent on the Ir content and are generally weakened in the presence of Ir, although the effect is less pronounced at lower temperatures.

AB - MgB2 wires with iridium doping were manufactured using the in-situ technique in a composite Cu-Nb sheath. Reaction was performed at 700°C, 800°C or 900°C for 1h in argon atmosphere. A maximum of about 1.5 at.% Ir replaces Mg in MgB2. The superconducting transition temperature is slightly lowered by Ir doping. The formation of IrMg3 and IrMg4 secondary phase particles is evidenced, especially for a nominal stoichiometry with 2.0 at.% Ir doping. The critical current density and accommodation field of the wires are strongly dependent on the Ir content and are generally weakened in the presence of Ir, although the effect is less pronounced at lower temperatures.

U2 - 10.1016/j.physc.2018.01.002

DO - 10.1016/j.physc.2018.01.002

M3 - Journal article

VL - 547

SP - 7

EP - 15

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

SN - 0921-4534

ER -

Grivel J-C. Influence of iridium doping in MgB2 superconducting wires. Physica C: Superconductivity and its Applications. 2018;547:7-15. https://doi.org/10.1016/j.physc.2018.01.002

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