PHASE-SEPARATION AND FINITE SIZE SCALING IN LA2-XSRXCUO4+DELTA[0-LESS-THAN-OR-EQUAL-TO(X,DELTA)LESS-THAN-OR-EQUAL-TO-0.03]

A study of the phase diagram and magnetic susceptibility chi(x,delta,T) of the title system is reported. For delta congruent-to 0.03, macroscopic phase separation, below congruent-to 300 K into superconducting La2-xSrxCuO4+delta' (delta' congruent-to 0.08) and nonsuperconducting La2-xSrxCuO4+delta'' (delta'' congruent-to 0.00) phases, known to occur for x-0, disappears by x congruent-to 0.03. The behaviors of the Neel temperature T(N)(x) and chi(x,T) of the antiferromagnetic phase (0 less-than-or-equal-to x less than or similar to 0.02, delta'' congruent-to 0.00) reveal a novel microscopic segregation of the doped holes in this phase into walls of hole-rich material separating undoped domains.