摘要
At the transition from normal to superconducting states there were anomalies of ultrasonic attenuation in single-phased specimens Bi_(2-x)Pb_(x)Sr_(2)CaCu_(2)O_(y)(T_(cmid)=80K);and as the temperature was lowered below Tcmid,the attenuation decreased rapidly.At the temperature about 135K there was a relatively high peak,which may be due to a certain relaxation process.
基金
Project supported by National Center for Research and Development on Superconduc-tivity of China.
