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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Veröffentlicht in:	Physica. C, Superconductivity Superconductivity, 2007-10, Vol.463-465, p.320-324
Hauptverfasser:	Lee, N., Jang, G.E., Kim, C., Sung, T., Han, Y., Jung, S.
Format:	Artikel
Sprache:	eng
Schlagworte:	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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Zusammenfassung:	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