NMR-NQR study of the crossover from the spin-glass to the superconducting phase in La2-xSrxCuO4

La-139 and Cu-63 NQR relaxation rates are used to obtain insights on the ef fects of itinerant holes on the magnetic in-plane correlation length, for x less than or equal to 0.04 in La2-xSrxCuO4. For these concentrations, corr esponding to spin-glass behavior at low temperature, evidence for the micro segregation of holes along stripes is presented. Preliminary relaxation res ults for an amount of Sr doping leading to superconductivity are also prese nted and discussed in terms of the crossover from the spin-glass to the und erdoped superconducting regime: for x = 0.06 a slowing down of spin fluctua tions is evidenced and superconductivity is found to coexist with spin-free zing.