Low temperature scanning-tip microwave near-field microscopy of YBa{sub 2}Cu{sub 3}O{sub 7{minus}x} films
- Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
- Center for Superconductivity, Department of Physics, University of Maryland, College Park, Maryland 20742 (United States)
We have explored the low temperature capability of a scanning-tip microwave near-field microscope to study superconductors. The shift in the quality factor of the microscope resonator can be used to obtain the temperature dependence of the surface resistance of a local region under the tip. Patterned YBa{sub 2}Cu{sub 3}O{sub 7{minus}x} films were scanned at various temperatures and surface resistance mapping was performed with high spatial resolution at 1.2 GHz. Superconducting transitions at different positions on a film can be detected. Edge-region defects in wet-etched patterns were observed and were shown to be nonsuperconducting at microwave frequencies at 80 K. {copyright} {ital 1997 American Institute of Physics.}
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 632519
- Journal Information:
- Applied Physics Letters, Vol. 71, Issue 14; Other Information: PBD: Oct 1997
- Country of Publication:
- United States
- Language:
- English
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