Surface impedance measurements of YBa2Cu3O(7-x) thin films in stripline resonators. (Reannouncement with new availability information). Meeting speech
Measurements of the rf surface impedance Zs of superconductors as a function of frequency, temperature, and rf magnetic field are of great interest because they yield information on many fundamental physical parameters of the material such as penetration depth, coherence length, energy gap, and electron mean free path. They are also important for practical applications of superconductors at rf frequencies because the value of the surface resistance determines the losses in the superconductor. Loss occurs at rf frequencies and finite temperatures because the penetration of the magnetic field into the material produces an electric field which couples to the normal unpaired electrons, leading to ohmic losses. At dc the electric field is zero and there are no losses.
- Research Organization:
- Massachusetts Inst. of Tech., Lexington, MA (United States). Lincoln Lab.
- OSTI ID:
- 91436
- Report Number(s):
- AD-A-241383/9/XAB; MS-8887; CNN: Contract F19628-90-C-0002; TRN: 52260844
- Resource Relation:
- Other Information: PBD: 1991
- Country of Publication:
- United States
- Language:
- English
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