Anomalous change in the photoacoustic phase near superconducting transition in YBa2Cu3O7 |
| |
| Authors: | Johney Isaac Jacob Philip B K Chaudhuri |
| |
| Institution: | (1) Department of Physics, Cochin University of Science and Technology, 682 022 Cochin, India;(2) Department of Solid State Physics, Indian Association for the Cultivation of Science, 700 032 Calcutta, India |
| |
| Abstract: | Photoacoustic amplitude and phase measurements have been carried out near the superconducting transition temperature in the
highT
csuperconductor YBa2Cu3O7. In both the samples investigated, the photoacoustic phase undergoes an anomalous step-like decrease aroundT
c≈ 96 K and increases at lower temperatures. A clear temperature hysteresis for the phase change has been noticed. No anomalous
variation has been observed in the amplitude values. Neither phase nor amplitude shows any anomaly in a non-superconducting
sample of the same composition. |
| |
| Keywords: | High temperature superconductors Y-Ba-Cu-O system photoacoustic amplitude photoacoustic phase |
| 本文献已被 SpringerLink 等数据库收录！ |
