I. Pop et al., STRUCTURAL, ELECTRICAL AND MAGNETIC-PROPERTIES OF HIGH-T-C YBA1.5CA0.5CU3O6+DELTA SUPERCONDUCTOR, Modern physics letters B, 10(27), 1996, pp. 1349-1353
A high-T-c YBa1.5Ca0.5Cu3O6+delta superconductor was synthesized, with
the critical temperature T-c = 84.9 K. The crystalline structure is o
rthorhombic with the lattice parameters a = 3.8665 Angstrom, b = 3.921
7 Angstrom and c = 11.7652 Angstrom, characteristic for the 123 superc
onductors. The diamagnetic transition in the temperature dependence of
the magnetic susceptibility strongly depends on the recycling of the
samples and the onset of superconductibility is depressed by the magne
tic field intensity.