The magnetoresistance of a highly c-axis-oriented chemical-vapor-deposition film of YBa2Cu3Oy was measured in the temperature range TcT103 K for both the Hc axis and Hc axis. The analysis has been done on the basis of the superconducting fluctuation theory for the clean limit, and a good fit has been obtained for the temperature and the magnetic-field dependences of the magnetoconductance in the cases of the Hc axis and Hc axis. The results indicated that all of both orbital and Zeeman effects of the Aslamasov-Larkin and the Maki-Thompson terms contributed to the fluctuation conductivity. The superconducting coherence lengths were estimated to be ab(0)=11.5 and c(0)=3.2 in addition to the phase breaking time of the carrier =8×10-14 sec at 100 K.
ASJC Scopus subject areas
- Condensed Matter Physics