10 papers
Anelastic relaxation process of polaronic origin in La{2-x}Sr{x}CuO{4}: interaction between the charge stripes and pinning centers
F. Cordero, A. Paolone, R. Cantelli +1
The evolution of an anelastic relaxation process occurring around 80 K in La{2-x}Sr{x}CuO{4} at a measuring frequency of ~1 kHz has been followed from x = 0.0075 to the overdoped r…
Anelastic spectroscopy study of the spin-glass and cluster spin-glass phases of LaSrCuO
A. Paolone, F. Cordero, R. Cantelli +1
The anelastic spectra of LaSrCuO have been measured at liquid He temperatures slightly below and above the concentration which is considere…
Observation of an incoherent thermally activated proton hopping process in calix-[4]-arene by means of anelastic spectroscopy
A. Paolone, R. Cantelli, R. Caciuffo +1
The anelastic spectrum of calix[4]arene was measured at two different vibrational frequencies. Three thermally activated peaks were detected. The lowest temperature peak can be des…
Pinning of the domain walls of the cluster spin-glass phase in LTT La_{2-x}Ba_xCuO_4
F. Cordero, A. Paolone, R. Cantelli +1
We compare the low frequency (~1 kHz) anelastic spectra of La_{2-x}Sr_xCuO_4 and La_{2-x}Ba_xCuO_4 at x = 0.03 and 0.06 in the temperature region where the freezing into the cluste…
Observation of the cluster spin-glass phase in La_{2-x}Sr_{x}CuO_{4} by anelastic spectroscopy
F. Cordero, R. Cantelli, A. Paolone +1
An increase of the acoustic absorption is found in La_{2-x}Sr_{x}CuO_{4} (x = 0.019, 0.03 and 0.06) close to the temperatures at which freezing of the spin fluctuations in antiferr…
Fano effect in the plane of NdCeCuO: evidence of phonon interaction with a polaronic background
S. Lupi, M. Capizzi, P. Calvani +4
Reflectance measurements in properly selected samples of NdCeCuO with different carrier concentrations provide a firm evidence of Fano antiresonances for…