Abstract

The superconducting transition of RBa2Cu3O7−x and RBa2Cu3O7−x (R=Y,Eu) with some additions of Ag has been measured in magnetic field up to 12 T. A comparison of transition curves for doped and undoped material clearly shows a considerable difference between them. We have interpreted this difference as a result of weak-coupling decay due to silver additions. We report of dHc2/dT for single cristal bloks constituting the investigated polycristal samples.

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