Superconducting and structural properties of Er1−xRxBa2Cu3Oy compounds with R = Yb,Ho,Gd,Eu,La,Y

摘要: Samples of the Er1−xRxBa2Cu3Oy compounds, with R = Yb, Ho, Gd, La, Eu and Y were prepared. The structure compounds wa studied by X-ray powder diffractometry superconducting properties resistivity susceptibility measurements. Tc was rather insensitive to substitution all elements, except in spite fact that changes values lattice parameters 1:2:3 vary smoothly. dependence on La concentration x analised explained a two-dimensional percolation model.