Relaxation of the electric resistance of YBaCuO single crystals due to hydrostatic pressure and jumpwise temperature variation

The effect of hydrostatic pressure on pressure, temperature, and time dependences of the conductivity in the ab-plane of YBa2Cu3O7−x single crystals with different oxygen concentrations (0.1 0.2, temperature and pressure variations may induce a nonequilibrium state in which effects associated with the variation of unit cell volume and redistribution of oxygen in Cu–O planes must be distinguished. Characteristic conductivity relaxation times under the effect of pressure and during annealing at room temperature are determined. It is concluded that these processes have the same origin.