Field-angle dependence of critical current in Ag-sheathed Bi-2212 and Bi-2223 tapes
- Kobe Steel Ltd., Hyogo (Japan)
- National Research Institute for Metals, Tsukuba, Ibaraki (Japan); and others
As part of the on-going VAMAS program aiming at the establishment of standard measurement methods for superconducting critical parameters of high temperature oxide superconductors, the authors studied the effect of applied magnetic field angle relative to the specimen on the critical current I{sub c}, using a 12 T split-paired superconducting magnet and Ag-sheathed Bi-2212 and Bi-2223 tapes fabricated by a powder-in-tube method. In the Bi-2223 tapes large hysteresis was observed in I{sub c} - B curves as well as in I{sub c} - field angle curves, while no appreciable hysteresis existed in the Bi-2212 tapes. When corrected to the normal component of applied field, the hysteretic I{sub c} - field angle curves well coincided With the hysteretic I{sub c} - B curves. Thus, it was found that except for fields nearly parallel to the tape surface, the field angle dependence of transport critical current is dominated by the magnetic field component normal to the tape surface.
- OSTI ID:
- 482052
- Report Number(s):
- CONF-950722--
- Journal Information:
- Advances in Cryogenic Engineering, Journal Name: Advances in Cryogenic Engineering Vol. 42B; ISSN 0065-2482; ISSN ACYEAC
- Country of Publication:
- United States
- Language:
- English
Similar Records
Critical current anisotropy and AC losses in Bi(Pb)SrCaCuO-2223 and TlBaCaCuO-2212 Ag sheathed superconducting tapes
Strain control of composite superconductors to prevent degradation of superconducting magnets due to a quench: II. High-strength, laminated Ag-sheathed Bi-2223 tapes