Topology of Superconducting Cluster in HTSC Ceramics
B. Yu. SokolovPhysics Faculty, Tashkent State University, Tashkent 700095, UzbekistanD.R. DzhurayevPhysics Faculty, Tashkent State University, Tashkent 700095, UzbekistanK. M. MukimovBukhara State University, Bukhara 703018, Uzbekistan
ABI
Annotatsiya
Experimental studies of electrical conduction of Y1Ba2Cu3O7—x ceramics near its critical state have been carried out by the method of laser point heating. It has been established that near the transition to the superconducting state the conductivity of the ceramics shows a cluster character, essentially inhomogeneous in the specimen cross section. The topology of the superconducting cluster and its spatial localization in the specimen have been studied. A model of the formation of a superconducting cluster in ceramic superconductors is proposed.
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