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Surface resistance measurement of superconducting YBa sub 2 Cu sub 3 O sub 7 in a magnetic field

Journal Article · · Journal of Materials Research; (USA)
 [1]; ; ; ;  [2];  [3];  [4]
  1. Center for Materials Science and Engineering, Massachusetts Institute of Technology, Department of Physics, Massachusetts Institute of Technology, Cambridge, MA (USA)
  2. Rome Air Development Center (RADC), Hanscom AFB, MA (USA)
  3. Francis Bitter National Magnet Laboratory, Massachusetts Institute of Technology, Cambridge, MA (USA)
  4. Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA (USA)
We report on the magnetic-field dependent surface resistance of polycrystalline YBa{sub 2}Cu{sub 3}O{sub 7} ({ital T}{sub {ital c}}{congruent}92 K), measured using a brass cylindrical cavity resonator, operating at 16.5 GHz in the TE{sub 011} mode. A dc magnetic field {ital H}{sub app} is applied parallel to the superconducting sample surface, and the temperature dependence of the surface resistance is measured for four different values of {ital H}{sub app} (0 T, 0.22 T, 1 T, 5 T). An effective medium theory and the two-fluid model are used to fit the surface resistance versus temperature measurements both in zero field and for various applied fields. These results are applied to characterize the microwave properties of a polycrystalline ceramic superdconductor.
OSTI ID:
6766644
Journal Information:
Journal of Materials Research; (USA), Journal Name: Journal of Materials Research; (USA) Vol. 5:8; ISSN JMREE; ISSN 0884-2914
Country of Publication:
United States
Language:
English