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超导材料的微波表面电阻R_1是表征样品本征特性的重要参量之一,在高T_c材料的理论研究和其高频应用技术的基础研究中都引起极大关注。由于像YBCO这样的高
The microwave surface resistance R_1 of superconducting materials is one of the most important parameters to characterize the intrinsic properties of samples. It has drawn great attention in the theoretical research of high Tc materials and the basic research of its high-frequency application technology. Due to such high as YBCO