MAGNETIC-PROPERTIES OF PR(BA2-XSRX)CU3OY SINGLE-CRYSTALS

The high quality Pr(Ba2-xSrx)Cu3Oy (0 less than or equal to x less tha n or equal to 0.6) crystals with isostructural to RBa(2)Cu(3)O(y) (R = Y or rare earth) compounds have been successfully prepared using a st oichiometrically melting growth method without flux. The x-ray diffrac tion patterns and rocking curves showed the well c-axis-oriented singl e-crystal nature of these specimens. The lattice parameter, degree of orientation, and crystallinity decrease with the substitution of Sr fo r Ba. No magnetic ordering was apparently observed in the series (x le ss than or equal to 0.6) by the all magnetization data between 5 K to 200 K and within +/- 1 T. The chi(ab)(-1)(T) with the applied field no rmal to c-axis have been fitted by simple Curie-Weiss law without cons idering the crystal field effect and shown the effective moments mu(ef f) 3.537 mu(B) for x = 0 and 3.572 mu(B) for x = 0.2, which is closely the Curie-Weiss moment value of free ion Pr3+.