Elsevier

Physics Letters A

Volume 130, Issue 3, 4 July 1988, Pages 182-186
Physics Letters A

Resistivity and magnetic susceptibility of superconducting and non-superconducting ErBa2Cu3O7−y

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Abstract

The oxide ErBa2Cu3O7−y has been obtained in the orthorhombic and the tetragonal forms by suitable heat treatments. The orthorhombic form is metallic and superconducting with Tc=88 K while the tetragonal form has high resistance and is non-superconducting. Magnetic studies on both types of compounds reveal that the rare earth ion moment is very close to its free ion value independent of the structure. In the tetragonal compound, deviations in the susceptibility from the Curie-Weiss behavior are noted at low temperatures which may be due to the effect of crystalline electric fields.

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