Doping effect of Zr and Ti on the critical current density of MgB2 bulk superconductors prepared under ambient pressure

Y. Zhao; Y. Feng; D. X. Huang; T. Machi; C. H. Cheng; K. Nakao; N. Chikumoto; Y. Fudamoto; N. Koshizuka; M. Murakami

doi:10.1016/S0921-4534(02)01395-3

Doping effect of Zr and Ti on the critical current density of MgB₂ bulk superconductors prepared under ambient pressure

Y. Zhao, Y. Feng, D. X. Huang, T. Machi, C. H. Cheng, K. Nakao, N. Chikumoto, Y. Fudamoto, N. Koshizuka, M. Murakami

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

41 Citations (Scopus)

Abstract

The doping effect of Ti and Zr on the superconducting properties and the microstructure of sintered MgB₂ bulk materials has been studied. The transition metal is found to work as a sintering assistant, which significantly enhances the grain connection of the MgB₂ bulk materials during sintering processing. With this technique, we have fabricated Ti-doped MgB₂ bulk materials consisting of fine 10 nm scale particles and achieved a high J_c over 1 MA/cm² in 0 T at 20 K. The large enhancement of J_c is explained by the excellent connection between grains and a high density of pinning centers served by grain boundaries and MgO nanoparticles.

Original language	English
Pages (from-to)	122-126
Number of pages	5
Journal	Physica C: Superconductivity and its applications
Volume	378-381
Issue number	PART 1
DOIs	https://doi.org/10.1016/S0921-4534(02)01395-3
Publication status	Published - 2002 Oct 1
Externally published	Yes

Keywords

Critical currents
Flux pinning
Metals, alloys and binary compounds

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

Access to Document

10.1016/S0921-4534(02)01395-3

Cite this

Zhao, Y., Feng, Y., Huang, D. X., Machi, T., Cheng, C. H., Nakao, K., Chikumoto, N., Fudamoto, Y., Koshizuka, N., & Murakami, M. (2002). Doping effect of Zr and Ti on the critical current density of MgB₂ bulk superconductors prepared under ambient pressure. Physica C: Superconductivity and its applications, 378-381(PART 1), 122-126. https://doi.org/10.1016/S0921-4534(02)01395-3

Zhao, Y, Feng, Y, Huang, DX, Machi, T, Cheng, CH, Nakao, K, Chikumoto, N, Fudamoto, Y, Koshizuka, N & Murakami, M 2002, 'Doping effect of Zr and Ti on the critical current density of MgB₂ bulk superconductors prepared under ambient pressure', Physica C: Superconductivity and its applications, vol. 378-381, no. PART 1, pp. 122-126. https://doi.org/10.1016/S0921-4534(02)01395-3

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abstract = "The doping effect of Ti and Zr on the superconducting properties and the microstructure of sintered MgB2 bulk materials has been studied. The transition metal is found to work as a sintering assistant, which significantly enhances the grain connection of the MgB2 bulk materials during sintering processing. With this technique, we have fabricated Ti-doped MgB2 bulk materials consisting of fine 10 nm scale particles and achieved a high Jc over 1 MA/cm2 in 0 T at 20 K. The large enhancement of Jc is explained by the excellent connection between grains and a high density of pinning centers served by grain boundaries and MgO nanoparticles.",

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AU - Zhao, Y.

AU - Feng, Y.

AU - Huang, D. X.

AU - Machi, T.

AU - Cheng, C. H.

AU - Nakao, K.

AU - Chikumoto, N.

AU - Fudamoto, Y.

AU - Koshizuka, N.

AU - Murakami, M.

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