Anelastic Spectroscopy and NQR Relaxation in Sr-doped La2-xSrxCuO4 around the AF Percolation Threshold

Anelastic spectra and ^139La NQR relaxation measurements have been carried out in La2-xSrxCuO4 (LSCO) for x around the critical value xc=0.02 separating the antiferromagnetic (AF) from the cluster spin glass (CSG) phase for Trightarrow 0. The anelastic spectra around 10 K show step-like features common to samples pertaining to both AF and CSG phases. In the light of recent neutron scattering measurements suggesting that the spin-glass phase of LSCO with x