Doping effect of nano-diamond on superconductivity and flux pinning in MgB₂

C. H. Cheng, H. Zhang, Y. Zhao, Y. Feng, X. F. Rui, P. Munroe, H. M. Zeng, N. Koshizuka, M. Murakami

Abstract

The doping effect of diamond nanoparticles on the superconducting properties of MgB₂ bulk material has been studied. It is found that the superconducting transition temperature T_c of MgB₂ is suppressed by the diamond doping, however, the irreversibility field H_irr and the critical current density J_c are systematically enhanced. Microstructural analysis shows that the diamond-doped MgB₂ superconductor consists of tightly-packed MgB₂ nano-grains (∼50-100 nm) with highly dispersed and uniformly distributed diamond nanoparticles (∼10-20 nm) inside the grains. The highly density of dislocations and diamond nanoparticles may be responsible for the enhanced flux pinning in the diamond-doped MgB₂.

Original language	English
Pages (from-to)	1182-1186
Number of pages	5
Journal	Superconductor Science and Technology
Volume	16
Issue number	10
DOIs	https://doi.org/10.1088/0953-2048/16/10/310
Publication status	Published - 2003 Oct 1

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ASJC Scopus subject areas

Ceramics and Composites
Condensed Matter Physics
Metals and Alloys
Electrical and Electronic Engineering
Materials Chemistry

Cite this

Doping effect of nano-diamond on superconductivity and flux pinning in MgB₂. / Cheng, C. H.; Zhang, H.; Zhao, Y.; Feng, Y.; Rui, X. F.; Munroe, P.; Zeng, H. M.; Koshizuka, N.; Murakami, M.

In: Superconductor Science and Technology, Vol. 16, No. 10, 01.10.2003, p. 1182-1186.

Research output: Contribution to journal › Article

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abstract = "The doping effect of diamond nanoparticles on the superconducting properties of MgB2 bulk material has been studied. It is found that the superconducting transition temperature Tc of MgB2 is suppressed by the diamond doping, however, the irreversibility field Hirr and the critical current density Jc are systematically enhanced. Microstructural analysis shows that the diamond-doped MgB2 superconductor consists of tightly-packed MgB2 nano-grains (∼50-100 nm) with highly dispersed and uniformly distributed diamond nanoparticles (∼10-20 nm) inside the grains. The highly density of dislocations and diamond nanoparticles may be responsible for the enhanced flux pinning in the diamond-doped MgB2.",

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AU - Cheng, C. H.

AU - Zhang, H.

AU - Zhao, Y.

AU - Feng, Y.

AU - Rui, X. F.

AU - Munroe, P.

AU - Zeng, H. M.

AU - Koshizuka, N.

AU - Murakami, M.

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AB - The doping effect of diamond nanoparticles on the superconducting properties of MgB2 bulk material has been studied. It is found that the superconducting transition temperature Tc of MgB2 is suppressed by the diamond doping, however, the irreversibility field Hirr and the critical current density Jc are systematically enhanced. Microstructural analysis shows that the diamond-doped MgB2 superconductor consists of tightly-packed MgB2 nano-grains (∼50-100 nm) with highly dispersed and uniformly distributed diamond nanoparticles (∼10-20 nm) inside the grains. The highly density of dislocations and diamond nanoparticles may be responsible for the enhanced flux pinning in the diamond-doped MgB2.

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