The anelastic spectra of La22xSrxCuO4 have been measured at liquid-He temperatures slightly below and above the concentration xc.0.02, which is considered to separate the spin-glass phase from the cluster spinglass ~CSG! phase. For x<xc , all the elastic energy-loss functions show a step below the temperature Tg(x 50.02) of freezing into the CSG state, similar to what is found in samples well within the CSG phase, but with a smaller amplitude. The excess dissipation in the CSG state is attributed to the motion of the domain walls between the clusters of antiferromagnetically correlated spin. These results are in agreement with the recent proposal, based on inelastic neutron scattering, of an electronic phase separation between regions with x;0 and x;0.02, at least for x.0.015.
Anelastic spectroscopy study of the spin-glass and cluster spin-glass phases of La2-xSrxCuO4 (0.015
FERRETTI, MAURIZIO
2002-01-01
Abstract
The anelastic spectra of La22xSrxCuO4 have been measured at liquid-He temperatures slightly below and
above the concentration xc.0.02, which is considered to separate the spin-glass phase from the cluster spinglass
~CSG! phase. For x
FERRETTI, MAURIZIO
2002-01-01
Abstract
The anelastic spectra of La22xSrxCuO4 have been measured at liquid-He temperatures slightly below and above the concentration xc.0.02, which is considered to separate the spin-glass phase from the cluster spinglass ~CSG! phase. For xI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
