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Determination of surface resistance and magnetic penetration depth of superconducting yba2cu3o(7-delta) thin films by microwave power transmission measurements
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Gordon, W. L. Bhasin, K. B. Warner, J. D. Newman, H. S. Miranda, F. A. |
| Copyright Year | 1990 |
| Description | A novel waveguide power transmission measurement technique was developed to extract the complex conductivity of superconducting thin films at microwave frequencies. The microwave conductivity was taken of two laser ablated YBa2Cu3O(7-delta) thin films on LaAlO3 with transition temperatures of approx. 86.3 and 82 K, respectively, in the temperature range 25 to 300 K. From the conductivity values, the penetration depth was found to be approx. 0.54 and 0.43 micron, and the surface resistance (R sub s) to be approx. 24 and 36 micro-Ohms at 36 GHz and 76 K for the two films under consideration. The R sub s values were compared with those obtained from the change in the Q-factor of a 36 GHz Te sub 011-mode (OFHC) copper cavity by replacing one of its end walls with the superconducting sample. This technique allows noninvasive characterization of high transition temperature superconducting thin films at microwave frequencies. |
| File Size | 392238 |
| Page Count | 8 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19910001467 |
| Archival Resource Key | ark:/13960/t7hq8v86g |
| Language | English |
| Publisher Date | 1990-09-01 |
| Access Restriction | Open |
| Subject Keyword | Solid-state Physics Transition Temperature Microwave Frequencies High Temperature Superconductors Contact Resistance Microwave Power Beaming Depth Thin Films Penetration Temperature Effects Barium Oxides Waveguides Copper Oxides Yttrium Oxides Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
