An. Lavrov et Lp. Kozeeva, EFFECT OF LOW-TEMPERATURE OXYGEN ORDERING ON THE PROPERTIES OF RBA2CU3O6-CRYSTALS(X (R = Y, TM, LU) SINGLE), Inorganic materials, 34(11), 1998, pp. 1177-1185
The effect of oxygen ordering on the normal-state and superconducting
properties of RBa2Cu3O6+x (R = Y, Tm, Lu) single crystals was studied
over a wide range of oxygen stoichiometries (0.29 less than or equal t
o x less than or equal to 0.92). At room temperature, oxygen ordering
was found to cause a significant (by up to 100 K) decrease in the Neel
temperature for all antiferromagnetic compositions (x < 0.4) and an i
ncrease in the superconducting transition temperature for superconduct
ing materials (0.4 < x < 0.9). A low-temperature phase diagram caking
into account oxygen ordering was constructed, and the role of particul
ar structural components is discussed. Analysis of correlations betwee
n the normal-state and superconducting properties indicates that the s
uperconducting transition temperature is affected not only by the carr
ier concentration in the CuO2 planes but also by interlayer coupling.