Pinning effect on critical dynamics in YBa{sub 2}Cu{sub 3}O{sub 7-delta} films inherent random disorder and with columnar defects.
The in-plane longitudinal resistivities of YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} (YBCO) films before and after Sn ion irradiation of a matching field 1 T have been measured as a function of magnetic field H ({le}6 T) and temperature T. The extracted fluctuation part of the conductivity {sigma}{sub xx}*(T, H) of the unirradiated sample with inherent random disorder exhibits 3D-XY scaling behavior that reveals dynamic critical exponent z=1.86 {+-} 0.1 and {approx}0.669. The inherent random disorder increases the dynamic critical exponent z to 1.86{+-}0.1 from the value of 1.5 that is for detwinned YBCO single crystal. After the irradiation, the fluctuation conductivity enhanced by the strong pinning of vortex shows deviation from the scaling behavior for the unirradiated one, suggesting that the critical dynamics is strongly perturbed by the strong pinning due to columnar defects.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- DOE Contract Number:
- DE-AC02-06CH11357
- OSTI ID:
- 938328
- Report Number(s):
- ANL/MSD/JA-29353; TRN: US200908%%194
- Journal Information:
- Physica C, Vol. 301, Issue 1-2 ; May 20, 1998
- Country of Publication:
- United States
- Language:
- ENGLISH
Similar Records
Pinning effect on fluctuation conductivity in a superconducting untwinned YBa{sub 2}Cu{sub 3}O{sub 7-delta} single crystal with columnar defects.
Sealing behaviour and hall conductivity of mixed-state hall effect in heavy-ion irradiated YBa{sub 2}Cu{sub 3}O{sub 7} crystals