Interaction between rare earth ion layer and Cu-O layers in Rba2Cu3Oy(R = magnetic rare earth ions)

The effects of Ni and Zn substitutions for Cu and quenching on the superconducting transition temperature Tc and magnetic properties above Tc have been investigated in RBa2Cu3Oy(R = Y, Nd, Gd, Dy and Er). In heavy rare earth compounds, the effects on magnetic properties are not remarkable and the decrease rate of Tc are almost same as that of Y compound. In Nd compound, the effects on Curie temperature θ and tc are larger than those of heavy rare earth compounds. The numerical estimation of the susceptibility of R ions including the crystalline electric field effect was performed