MAGNETIC-SUSCEPTIBILITY OF SUPERCONDUCTING LA2-XSRXCUO4

The T-dependent part of magnetic susceptibility chi, chi(F)(s)(T), for La2-xSrxCuO4 (0.08<x<0.2) follows a scaling law. The chi-T curve give n by the sum of chi(F)(s)(T) and a constant term, related to the Pauli paramagnetism of the present system, is consistent with the spin part of Knight shift for Cu-63 nuclei over a wide variety of Sr-content, i ncluding an x-range above x similar to 0.2. The T-dependence of chi fo r x>0.2, showing Curie-like behavior at low temperatures, can be repro duced by a combination of a Curie term and a T-dependent term chi(F)(s )(T) which follows the scaling law as that for 0.08<x<0.2. The Curie t erm increases with increasing x above x similar to 0.2 where T-c is st rongly suppressed, but it is corroborated by specific heat experiments that pair-breaking due to the local magnetic moments is not the domin ant origin of the strong suppression of T-c for x>0.2.