Abstract
An experimental study is reported of the influence of temperature (T), electric field polarity (±E), as well as of changes in the electrode/insulator/superconductor (E/I/S) measuring system on the field effect in the ceramic (BiPb)2Sr2Ca2Cu3Ox. It has been established that at 77 K and for E⩾60 MV/m the critical current I c and conductivity of the sample increase for I>I c, irrespective of the field polarity. For lower fields and a negative electrode potential the conductivity in an electric field may decrease. The field effect decreases with increasing temperature, to practically vanish near T c where the sample is still in superconducting state. Experiments carried out with more complex systems E/I/M/I/S and E/I/M/S (M stands for a metallic foil) support the conclusion that it is the external electric field that is responsible for the observed effects.
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Fiz. Tverd. Tela (St. Petersburg) 39, 1967–1970 (December 1997)
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Smirnov, B.I., Orlova, T.S., Kudymov, A.N. et al. Influence of experimental conditions on the electric field effect in the ceramic (BiPb)2Sr2Ca2Cu3Ox . Phys. Solid State 39, 1759–1761 (1997). https://doi.org/10.1134/1.1130166
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DOI: https://doi.org/10.1134/1.1130166