Pinning effect on fluctuation conductivity in a superconducting untwinned YBa{sub 2}Cu{sub 3}O{sub 7-delta} single crystal with columnar defects.
The effect of columnar defects on the critical dynamics of a superconducting untwinned YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} (YBCO) single crystal has been investigated. The columnar defects are produced by Sn ion irradiation of which dose corresponds to a matching field of 1 T. The in-plane longitudinal resistivity of the irradiated YBCO crystal has been measured as a function of magnetic field H and temperature T. The extracted fluctuation conductivities are enhanced by the strong pinnings and do not exhibit the same three-dimensional (3D) XY scaling behavior as for the unirradiated YBCO single crystal; particularly at the magnetic field values near the matching field of 1 T, the fluctuation conductivities show a clear deviation from the critical dynamics. At higher magnetic fields, however, the signature of the 3D-XY scaling appears.
- Research Organization:
- Argonne National Laboratory (ANL)
- Sponsoring Organization:
- ER
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 938258
- Report Number(s):
- ANL/MSD/JA-28656
- Journal Information:
- Phys. Rev. B, Journal Name: Phys. Rev. B Journal Issue: 13 ; Apr. 1, 1998 Vol. 57; ISSN PRBMDO; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- ENGLISH
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