Excess Mg addition MgB2 /Fe wires with enhanced critical current density

R. Zeng; L. Lu; W. X. Li; J. L. Wang; D. Q. Shi; J. Horvat; S. X. Dou; M. Bhatia; M. Sumption; E. W. Collings; J. M. Yoo; M. Tomsic; M. Rindfleisch

doi:10.1063/1.2909203

Excess Mg addition MgB2 /Fe wires with enhanced critical current density

R. Zeng, L. Lu, W. X. Li, J. L. Wang, D. Q. Shi, J. Horvat, S. X. Dou, M. Bhatia, M. Sumption, E. W. Collings, J. M. Yoo, M. Tomsic, M. Rindfleisch

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Abstract

MgB2 /Fe wires with 10 at. % excess Mg produced by in situ powder-in-tube processing were compared to normal stoichiometric MgB2 /Fe wires prepared by the same method. It was found that the critical current density (Jc) and the irreversibility field (Hirr) were significantly enhanced for MgB2 /Fe wires with excess Mg. The transport Jc for 10 at. % Mg excess samples sintered at 800 °C, measured at a field of up to 14 T, increased by a factor of 2 compared to that for the normal MgB2 wires. The best Jc results for the 10 at. % Mg excess sample were obtained by heating the sample at 600 °C for 1 h; the Jc at a field of 8 T and at temperature of 10 K reached 3× 104 A/ cm2. The detailed analysis of the effect of excess Mg on the microstructures, the Jc, and the Hirr, of MgB2 /Fe wires are presented in this paper.

Original language	English
Article number	83911
Pages (from-to)	1-6
Number of pages	6
Journal	Journal of Applied Physics
Volume	103
Issue number	8
DOIs	https://doi.org/10.1063/1.2909203
Publication status	Published - 2008

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@article{355126129d374bcea7ba73451165d302,

title = "Excess Mg addition MgB2 /Fe wires with enhanced critical current density",

abstract = "MgB2 /Fe wires with 10 at. % excess Mg produced by in situ powder-in-tube processing were compared to normal stoichiometric MgB2 /Fe wires prepared by the same method. It was found that the critical current density (Jc) and the irreversibility field (Hirr) were significantly enhanced for MgB2 /Fe wires with excess Mg. The transport Jc for 10 at. % Mg excess samples sintered at 800 °C, measured at a field of up to 14 T, increased by a factor of 2 compared to that for the normal MgB2 wires. The best Jc results for the 10 at. % Mg excess sample were obtained by heating the sample at 600 °C for 1 h; the Jc at a field of 8 T and at temperature of 10 K reached 3× 104 A/ cm2. The detailed analysis of the effect of excess Mg on the microstructures, the Jc, and the Hirr, of MgB2 /Fe wires are presented in this paper.",

author = "R. Zeng and L. Lu and Li, {W. X.} and Wang, {J. L.} and Shi, {D. Q.} and J. Horvat and Dou, {S. X.} and M. Bhatia and M. Sumption and Collings, {E. W.} and Yoo, {J. M.} and M. Tomsic and M. Rindfleisch",

year = "2008",

doi = "10.1063/1.2909203",

language = "English",

volume = "103",

pages = "1--6",

journal = "Journal of Applied Physics",

issn = "0021-8979",

publisher = "AIP Publishing ",

number = "8",

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TY - JOUR

T1 - Excess Mg addition MgB2 /Fe wires with enhanced critical current density

AU - Zeng, R.

AU - Lu, L.

AU - Li, W. X.

AU - Wang, J. L.

AU - Shi, D. Q.

AU - Horvat, J.

AU - Dou, S. X.

AU - Bhatia, M.

AU - Sumption, M.

AU - Collings, E. W.

AU - Yoo, J. M.

AU - Tomsic, M.

AU - Rindfleisch, M.

PY - 2008

Y1 - 2008

N2 - MgB2 /Fe wires with 10 at. % excess Mg produced by in situ powder-in-tube processing were compared to normal stoichiometric MgB2 /Fe wires prepared by the same method. It was found that the critical current density (Jc) and the irreversibility field (Hirr) were significantly enhanced for MgB2 /Fe wires with excess Mg. The transport Jc for 10 at. % Mg excess samples sintered at 800 °C, measured at a field of up to 14 T, increased by a factor of 2 compared to that for the normal MgB2 wires. The best Jc results for the 10 at. % Mg excess sample were obtained by heating the sample at 600 °C for 1 h; the Jc at a field of 8 T and at temperature of 10 K reached 3× 104 A/ cm2. The detailed analysis of the effect of excess Mg on the microstructures, the Jc, and the Hirr, of MgB2 /Fe wires are presented in this paper.

AB - MgB2 /Fe wires with 10 at. % excess Mg produced by in situ powder-in-tube processing were compared to normal stoichiometric MgB2 /Fe wires prepared by the same method. It was found that the critical current density (Jc) and the irreversibility field (Hirr) were significantly enhanced for MgB2 /Fe wires with excess Mg. The transport Jc for 10 at. % Mg excess samples sintered at 800 °C, measured at a field of up to 14 T, increased by a factor of 2 compared to that for the normal MgB2 wires. The best Jc results for the 10 at. % Mg excess sample were obtained by heating the sample at 600 °C for 1 h; the Jc at a field of 8 T and at temperature of 10 K reached 3× 104 A/ cm2. The detailed analysis of the effect of excess Mg on the microstructures, the Jc, and the Hirr, of MgB2 /Fe wires are presented in this paper.

UR - http://handle.uws.edu.au:8081/1959.7/536126

U2 - 10.1063/1.2909203

DO - 10.1063/1.2909203

M3 - Article

SN - 0021-8979

VL - 103

SP - 1

EP - 6

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 8

M1 - 83911

ER -

Excess Mg addition MgB2 /Fe wires with enhanced critical current density

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