Study Of Co-existence Of Superconductivity And Ferromagnetism In Pr Doped Yba2cu307-6

The co- existence of superconductive and magnetic properties of Yi - xPrxB(i2Cu307-srnhas been investigated. The suppression of Tc by the Pr concentration can be describedrnby the Abrikosov-Gorkov pair-breaking like relation , and hybridization between Prrn4f states and conduction bands may play an important role in the suppression of Tc .rnWe have determined the dependency of Tc on the impurity concentration. Superconductivityrnvanishes at a certain critical concentration. We have made a detailed studyrnof co- existence of superconductivity and ferromagnetism in the concentration rangernclose to the critical . We also study the effect of spin-spin interaction at T < Tmrnand spin-electron interactions on superconducting transition point. Superconductivityrnappears together with ferromagnetism but persists only until the ferromagneticrneffect is not sufficiently large

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