Abstract
The substitutional effect of Pr ion for La in (La1−xPrx)Ba2Cu3Oz bulk samples prepared under modified synthesis condition has been studied. Low field magnetization studies showed that superconductivity is retained up to the critical Pr ion concentration, xcr=0.40. The effective magnetic moment of Pr3+ free ion is very low in the present series of compounds. Results of X-ray absorption near-edge structure spectra for the series of (La1−xPrx)Ba2Cu3Oz compounds with 0.00<x<0.60 reveal that the doped Pr ion reduces hole concentration within the CuO2 planes, leading to a destruction of superconductivity.
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