Funct. Mater. 2016; 23 (3): 370-377.
Effect of pressure on paraconductivity in HoBa2Cu3O7-δ single crystals with oxygen deficiency
1V.Karazin Kharkiv National University, 4 Svobody Sq., 61022 Kharkiv, Ukraine
2Ukrainian State University of Railway Transport, 7 Feyerbaha Sq., 61050 Kharkiv, Ukraine
In this work, we have investigated the effect of high pressure on conductivity in basal plane of the high temperature super conducting single crystals HoBa2Cu3O7-δ with oxygen deficiency. It has been determined that the excess conductivity Δσ(T) of HoBa2Cu3O7-δsingle crystals in temperature interval near the critical temperature (Tc) is described within the framework of the Aslamazov-Larkin theoretical model. It has been shown that evolution of the transverse coherence length ξc(0) in the case of application/removal of the high pressure is largely determined by the "relaxation" pressure effect during prolonged exposure of the sample under load at the room temperature.
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