Microwave Measurements of Surface Resistance and Complex Conductivity of NdBaCuO Films

Abstract:

Typically microwave properties of High Temperature Superconducting films are defined in terms of surface resistance R_s computed from Q-factor measurements obtained using one of resonant techniques. While NdBaCuO films are known to have higher T_C and J_C than YBaCuO films, not much is known about their loss at high frequencies. In this paper we report on microwave properties of NdBaCuO films of varying quality and thickness based on measurements with a 25GHz sapphire Hakki Coleman resonator and computations using two approaches: the surface resistance and the complex conductivity as primary variables for rigorous electromagnetic solutions.

• Periodical: Advances in Science and Technology (Volume 95)
• Pages: 162-168
• DOI: https://doi.org/10.4028/www.scientific.net/AST.95.162
• Online since: October 2014
• Authors: Janina Mazierska*, Kenneth Leong, Dimitri Ledenyov, Adam Rains, Nina Zuchowski, Jerzy Krupka
• Keywords: Complex Conductivity, Effective Surface Resistance, High Temperature Superconductors, Intrinsic Surface Resistance, Microwave Properties, NdBaCuO Films, Penetration Depth, Sapphire Dielectric Resonator

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