Enhancement of critical current density in MgB2 bulk superconductor by Ti doping

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

doi:10.1209/epl/i2002-00479-1

Enhancement of critical current density in MgB₂ bulk superconductor by Ti doping

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

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

17 Citations (Scopus)

Abstract

We studied the Ti doping effect on the superconducting properties and microstructure of sintered MgB₂ bulk polycrystals. Using Ti as a sintering assistant, we have fabricated MgB₂ bulk materials consisting of fine 10 nm scale particles and achieved a high J_c of 1 MA/cm² in self-field and 3 × 10⁵ A/cm² in 1 T at 20 K. The large enhancement of J_c is explained by the excellent connection between grains and the high density of pinning centers served by both grain boundaries and MgO nanoparticles.

Original language	English
Pages (from-to)	437-443
Number of pages	7
Journal	Europhysics Letters
Volume	57
Issue number	3
DOIs	https://doi.org/10.1209/epl/i2002-00479-1
Publication status	Published - 2002
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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AU - Zhao, Y.

AU - Feng, Y.

AU - Machi, T.

AU - Cheng, C. H.

AU - Huang, D. X.

AU - Fudamoto, Y.

AU - Koshizuka, N.

AU - Murakami, M.

PY - 2002

Y1 - 2002

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AB - We studied the Ti doping effect on the superconducting properties and microstructure of sintered MgB2 bulk polycrystals. Using Ti as a sintering assistant, we have fabricated MgB2 bulk materials consisting of fine 10 nm scale particles and achieved a high Jc of 1 MA/cm2 in self-field and 3 × 105 A/cm2 in 1 T at 20 K. The large enhancement of Jc is explained by the excellent connection between grains and the high density of pinning centers served by both grain boundaries and MgO nanoparticles.

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