Electronic Resource
Springer
Physics of the solid state
39 (1997), S. 1178-1183
ISSN:
1063-7834
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract The appearance of superconductivity and relaxation of the transition temperature to its equilibrium value T c≈30 K over the course of five days have been observed in a tetragonal sample of NdBa2Cu3O6.67 under 1 GPa pressure. The time dependence T c(t) correlates with a decrease of the room-temperature electrical resistance R(t). The superconducting phase disappears 1.3 h after the pressure is removed. This behavior is explained by a redistribution of charge as a result of pressure-induced oxygen reordering in the CuOx planes. A large effect of oxygen ordering on the transition temperature under pressure has been observed near the metal-insulator transition (the largest of all those measured in the 1-2-3 system), along with a nonlinear temperature dependence of T c.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1134/1.1130114
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