Impurities and defects of high-Jc YBa2Cu3Ox superconductor with flux jumps
Wang, L. P. ; Chen, K. ; Lin, C. L. ; Chu, J. J.
[S.l.] : American Institute of Physics (AIP)
Published 1991
[S.l.] : American Institute of Physics (AIP)
Published 1991
| ISSN: |
1089-7550
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| Source: |
AIP Digital Archive
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| Topics: |
Physics
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| Notes: |
The microstructures of a highly textured bulk YBa2Cu3 (123) superconductor, with the high-transport Jc (≥ (R18)3.7×104 A/cm2 at 77 K) and flux jumps (T〈15 K), were characterized by x-ray diffraction, polarized optical microscopy, scanning electron microscopy, and scanning transmission electron microscopy. It was found that the grains of the 123 superconductor are preferentially oriented along the a-b plane of the 123 phase. The Y2BaCuO5 and CuO particles are dispersed uniformly in the 123 matrix, and the highly dense twins run through the matrix everywhere. Some irregular-shaped BaCuO2-CuO mixtures were observed at the 123 grain boundaries. The aligned 123 crystals and microstructural defects in the 123 matrix are considered to be responsible for the high-Jc value and flux jumps.
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| Type of Medium: |
Electronic Resource
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| URL: |