The effects of artificial holes with different diameters on the surface magnetic properties in YBCO superconductor

Bulk YBCO superconductor was manufactured with the top-seeded melt grown method. In order to elucidate the effects of defects in YBCO, the melt-textured superconductor was arbitrary drilled by mechanical tool on the surface along c-axis. Typical artificial hole diameters were 0.5, 0.7 and 1.0mm, res...

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Bibliographic Details
Published in:Physica. C, Superconductivity Superconductivity, 2007-10, Vol.463-465, p.320-324
Main Authors: Lee, N., Jang, G.E., Kim, C., Sung, T., Han, Y., Jung, S.
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Granular, melt-textured, amorphous and composite superconductors
Inhomogeneous superconductors and superconducting systems
Levitation force
Magnetic field distribution
Magnetic properties
Physics
Properties of type I and type II superconductors
Superconductivity
YBCO
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Summary:Bulk YBCO superconductor was manufactured with the top-seeded melt grown method. In order to elucidate the effects of defects in YBCO, the melt-textured superconductor was arbitrary drilled by mechanical tool on the surface along c-axis. Typical artificial hole diameters were 0.5, 0.7 and 1.0mm, respectively. Based on the measurements of magnetic flux mapping and levitation force, we conclude that the magnetic field trapping capacity decreased systematically with increasing the diameters of hole. The maximum magnetic flux density of the sample without any holes was 0.05T, while the maximum magnetic flux density of sample with 1.0mm hole in diameter was very low as around 0.023T.
ISSN:0921-4534
1873-2143
DOI:10.1016/j.physc.2007.02.053