Magnetization current of a thin layer of Bi{sub 1.8}Pb{sub 0.4}Sr{sub 2.0}Ca{sub 2.2}Cu{sub 3.0}O{sub 4} near silver in Ag-sheathed BSCOO-2223 tapes.
The thin superconducting region next to the silver sheath in Ag-sheathed BSCCO-2223 tapes, which appears to be the high critical current density region was studied. Magnetic hysteresis measurements were performed on the 10 {micro}m thin layer of Bi{sub 1.8}Pb{sub 0.4}Sr{sub 2.0}Ca{sub 2.2}Cu{sub 3.0}O{sub y} near the silver sheath as a function of temperature, intensity, and orientation of the applied field with respect to the tape. The full penetration depth, B*, for a superconducting slab was found to have a power law dependence on temperature. Correlating the magnetic and transport measurements for the 10 {micro}m thin layer of Bi{sub 1.8}Pb{sub 0.4}Sr{sub 2.0}Ca{sub 2.2}Cu{sub 3.0}O{sub y} near the silver sheath showed that the 'self-field' for a transport critical current of 20 A at liquid nitrogen temperature was approximately 0.04 T. Magnetization currents as a function of temperature and applied field oriented parallel and orthogonal to the thickness dimension of the tape, Jc( mu {sub 0}H{sub app}, T), were determined from the magnetization loop width using a Bean model expression adapted for an orthorhombic sample. Only Jc( {mu} {sub 0}H{sub app}, T) values for an applied magnetic field greater than B* were calculated. Jc values that were one order of magnitude higher than those previously reported were obtained.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- DOE Contract Number:
- DE-AC02-06CH11357
- OSTI ID:
- 937767
- Report Number(s):
- ANL/ET/JA-18696; SUSTEF; TRN: US200905%%427
- Journal Information:
- Supercond. Sci. Technol., Vol. 8, Issue 5 ; May 1995; ISSN 0953-2048
- Country of Publication:
- United States
- Language:
- ENGLISH
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