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Electric,magnetic, and transport critical current density behavior of the 2201, 2212, and 2223 phases of ‘BSCCO’ |
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| Authors: | G. Balestrino U. Gambardella M. Marinelli A. Paoletti P. Paroli G. Paternò |
| Affiliation: | 1. Dipartimento di Fisica, Università di Salerno, I-84100, Salerno, Italy 2. Istituto di Elettronica dello Stato Solido del C.N.R, Via Cineto Romano 42, I-00256, Roma, Italy 3. INFN, C.P. 13, I-00044, Frascati (Roma), Italy 4. ENEA, CRE, C.P. 65, I-00044, Frascati (Roma), Italy 5. Dipartimento di Ingegneria Meccanica, II Università di Roma, Via O. Raimondo 42, I-00173, Roma, Italy |
| Abstract: | We have studied the electrical properties of polycrystalline pellets of the high-T c superconducting phases occurring in the Bi2O3-SrO-CaO-CuO (BSCCO) system, having nominal compositions Bi2Sr2Cu1O6+y, (2201 phase, withT c = 10 K.) Bi2Sr2CaCu2O8+y (2212 phase, withT c = 85 K), and Bi2Sr2Ca2Cu3O10+y (2223 phase, withT c = 110 K). Pellets containing the 2223 phase having zero resistance below 105 K were obtained. For the 2212 and 2223 phases, the transport critical current density was measured as a function of temperature and of the externally applied magnetic field. As previously found for YBa2Cu3O7-x (YBCO), results are consistent with the occurrence of a weak superconducting coupling among the grains. Such coupling was, however, noticeably stronger for the 2223 phase than for the 2212 phase. |
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