Anomalous T_c Alteration of Quenched Bi_2Sr_2CaCu_2O_x : Electrical Properties of Condensed Matter
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The full superconducting transition of a single-phase low-T_c specimen was investigated as a function of a quenching temperature T_q. The midpoint T_c varied from 68.8 K to 95.9 K. A surprising feature was that the T_c had a steep minimum at T_c=300℃.The oxygen stoichiometry did not seem to be a dominant factor for the determination of T_c. We speculate that the (BiO)_2 layer was responsible for controlling the hole concentration of the CuO_2 plane.
- 社団法人応用物理学会の論文
- 1988-12-20
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