Cu-NQR study for static spin-charge stripe order in La2-x-ySrxYyCuO4 with x=1/8

Cu-NQR spectra in La2-x-ySrxYyCuO4 (x = 1/8, y = 0.04) were measured to inv estigate the possible static spin-charge stripe order. We obtained an insig ht for a glassy nature of the ordering process. The charge order is trigger ed at T-charge approximate to 70 K. But the spin order is still quasi stati c in NQR time scale until T-spin (<4.2 K), which causes dynamical wipeout o f the NQR signal below 55 K. At 1.5 K (<T-spin), the characteristic broad s pectrum reappears. The broad spectrum is simulated satisfactorily based upo n the stripe model with the modulation amplitude of the Cu moment of about 0.22 mu (B). (C) 2001 Elsevier Science B.V. All rights reserved.