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Superconductivity above 90 K in magnetic rare earth-barium-copper oxides

et al.

Published Web Location

https://doi.org/10.1016/0304-8853(87)90221-6
Creative Commons 'BY' version 4.0 license
Abstract

We report measurements of the superconducting and magnetic behavior of GdBa2Cu3Ox. Superconductivity occurs below Tc = 95 and 93 K, respectively, for these compounds with large Meissner effects observed. The Gd-based compound has an upper critical field slope -dHc2 dT greater than 1.2 T/K. Both compounds exhibit Curie-Weiss behavior above Tc with free-ion effective moments and small, negative temperature intercepts. In addition, the Gd-based compound orders antiferromagnetically below 2.24 K with an entropy consistent with the ordering of seven unpaired spins. © 1987.

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