Sv. Lubenets et al., ELASTIC-MODULI AND LOW-TEMPERATURE ANOMAL IES OF ACOUSTIC PROPERTIES OF HIGH-TEMPERATURE SUPERCONDUCTORS, Fizika nizkih temperatur, 21(5), 1995, pp. 475-497
In the review, experimental data ore given both on the propagation vel
ocities of the longitudinal and transverse elastic waves and on the el
astic constants of a veriety of the single crystalline and ceramic met
al-oxides La2CuO4, La2-xSrxCuO4, YBa2Cu3O7-delta, Bi(Pb)-Sr-Ca-Cu-O. T
he elastic moduli of isotropic polycrystals calculated by averaging th
e single crystalline elastic stiffnesses of the appropriate materials
and the Debye temperatures calculated from the empirical values of the
acoustic wave velocities are systematized. The information on the low
temperature anomalies of the acoustic properties of single crystallin
e and ceramic HTSCs are summarized: the relaxation peaks of th elastic
vibration attenuation, the hysteresis effects of the temperature depe
ndences of the elastic moduli, the feature of the elastic characterist
ics bihaviour in the vicinity of the superconducting transition. The f
irst results of an investigation into elastic properties of C-60 fulle
rene are discussed.