Applied physics
No. 4, 1997

Researches of the fluctuation contribution to IV-curves
for single crystal YBa2Cu3O7-x near Tc

A.I. Golovashkin, I.S. Levchenko, Ch. Shukurov
P.N. Lebedev Physics Institute of RAS, Moscow, Russia

A.I.Baikov
General Physics Institute of RAS, Moscow, Russia

   The measurements of IV-curves for single crystal YBa2Cu3O7-x near temperature of phase trasition (T > Tc) to superconductive state have been carried out. It was revealed nonlinear in a wide IV-curves temperature interval. The nonlinear IV-curves of HTSC near Tc were explained by the order parameter fluctuations. It was developed the method of determination of the fluctuation contribution sf to conductivity of super-contuctors based on the measurements of IV-curves. The temperature dependencies of fluctuating sf and normal sn conductivity of single crystal YBa2Cu3O7-x in 95 - 105K interval of temperature were found.

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