High intergranular critical currents in metallic MgB2 superconductor

M. Kambara; N. Hari Babu; E. S. Sadki; J. R. Cooper; H. Minami; D. A. Cardwell; A. M. Campbell; I. H. Inoue

doi:10.1088/0953-2048/14/4/101

High intergranular critical currents in metallic MgB₂ superconductor

M. Kambara, N. Hari Babu, E. S. Sadki, J. R. Cooper, H. Minami, D. A. Cardwell, A. M. Campbell, I. H. Inoue

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

188 Citations (Scopus)

Abstract

Strong evidence for high intergranular critical current densities and large bulk magnetic flux pinning in superconducting polycrystalline MgB₂ has been observed. The presence of strongly-coupled grain boundaries in this material has been confirmed by a dramatic collapse of the magnetic hysteresis loop when a bulk specimen is ground into a fine powder and re-measured under similar conditions. Further evidence for strong integrain links in polycrystalline MgB₂ is provided by the continuous variation of the remanent magnetic moment up to the full penetration field of a bulk sample. The absence of weak-link nature in this material has profound implications for its potential in a wide range of engineering applications.

Original language	English
Pages (from-to)	L5-L7
Journal	Superconductor Science and Technology
Volume	14
Issue number	4
DOIs	https://doi.org/10.1088/0953-2048/14/4/101
Publication status	Published - Apr 2001
Externally published	Yes

ASJC Scopus subject areas

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

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10.1088/0953-2048/14/4/101

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abstract = "Strong evidence for high intergranular critical current densities and large bulk magnetic flux pinning in superconducting polycrystalline MgB2 has been observed. The presence of strongly-coupled grain boundaries in this material has been confirmed by a dramatic collapse of the magnetic hysteresis loop when a bulk specimen is ground into a fine powder and re-measured under similar conditions. Further evidence for strong integrain links in polycrystalline MgB2 is provided by the continuous variation of the remanent magnetic moment up to the full penetration field of a bulk sample. The absence of weak-link nature in this material has profound implications for its potential in a wide range of engineering applications.",

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AU - Kambara, M.

AU - Babu, N. Hari

AU - Sadki, E. S.

AU - Cooper, J. R.

AU - Minami, H.

AU - Cardwell, D. A.

AU - Campbell, A. M.

AU - Inoue, I. H.

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N2 - Strong evidence for high intergranular critical current densities and large bulk magnetic flux pinning in superconducting polycrystalline MgB2 has been observed. The presence of strongly-coupled grain boundaries in this material has been confirmed by a dramatic collapse of the magnetic hysteresis loop when a bulk specimen is ground into a fine powder and re-measured under similar conditions. Further evidence for strong integrain links in polycrystalline MgB2 is provided by the continuous variation of the remanent magnetic moment up to the full penetration field of a bulk sample. The absence of weak-link nature in this material has profound implications for its potential in a wide range of engineering applications.

AB - Strong evidence for high intergranular critical current densities and large bulk magnetic flux pinning in superconducting polycrystalline MgB2 has been observed. The presence of strongly-coupled grain boundaries in this material has been confirmed by a dramatic collapse of the magnetic hysteresis loop when a bulk specimen is ground into a fine powder and re-measured under similar conditions. Further evidence for strong integrain links in polycrystalline MgB2 is provided by the continuous variation of the remanent magnetic moment up to the full penetration field of a bulk sample. The absence of weak-link nature in this material has profound implications for its potential in a wide range of engineering applications.

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High intergranular critical currents in metallic MgB₂ superconductor

Abstract

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