Millimeter Wave Transmission Studies of YBa2Cu3O7−δ Thin Films in the 26.5 to 40.0 GHz Frequency Range

  • F. A. Miranda
  • W. L. Gordon
  • K. B. Bhasin
  • V. O. Heinen
  • J. D. Warner
  • G. J. Valco


Millimeter wave transmission measurements through YBa2Cu3O7−δ thin films on MgO, ZrO2 and LaA1O3 substrates, are reported. The films (0.2 to 1.0 μm) were deposited by sequential evaporation and laser ablation techniques. Transition temperatures Tc, ranging from 89.7 K for the laser ablated film on LaA1O3 to approximately 72 K for the sequentially evaporated film on MgO, were obtained. The values of the real and imaginary parts of the complex conductivity, σ1 and σ2, are obtained from the power transmitted through the film, assuming a two fluid model. The magnetic penetration depth is evaluated from the values of σ2. These results will be discussed together with the frequency dependence of the normalized transmission amplitude, P/Pc, below and above Tc.


Laser Ablation Fluid Model Microwave Absorption Versus Temperature Complex Conductivity 
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Copyright information

© Springer Science+Business Media New York 1990

Authors and Affiliations

  • F. A. Miranda
    • 1
  • W. L. Gordon
    • 1
  • K. B. Bhasin
    • 2
  • V. O. Heinen
    • 2
  • J. D. Warner
    • 2
  • G. J. Valco
    • 3
  1. 1.Department of PhysicsCase Western Reserve UniversityClevelandUSA
  2. 2.National Aeronautics and Space AdministrationLewis Research CenterClevelandUSA
  3. 3.Department of Electrical EngineeringThe Ohio State UniversityColumbusUSA

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