MEASUREMENTS OF THE SURFACE-RESISTANCE OF HIGH-TC SUPERCONDUCTORS AT HIGH RF FIELDS

被引：23

作者：

DELAYEN, JR

BOHN, CL

ROCHE, CT

机构：

[1] Engineering Physics Division, Argonne National Laboratory, Argonne, 60439, Illinois, 9700, South Cass Avenue

来源：

JOURNAL OF SUPERCONDUCTIVITY | 1990年 / 3卷 / 03期

关键词：

accelerator; High-T[!sub]c[!/sub; microwave; superconductors;

D O I：

10.1007/BF00625264

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report measurements of the r.f. surface resistance of a wide variety of high-Tc superconductors in bulk form and as films on silver substrates. Several apparatuses have been constructed and used for measurements at frequencies from 0.15 to 40 GHz and r.f. surface magnetic fields as high as 640 G. In every case in which the field dependence of the surface resistance was measured, the surface resistance increased monotonically with field amplitude through a transition region characterized by a strong field dependence. It then saturated at high field at a value of a few percent of the normal-state surface resistance just above Tc. In the presence of this field dependence, the frequency dependence of the surface resistance changed from quadratic to less than linear. © 1990 Plenum Publishing Corporation.

引用

页码：243 / 250

页数：8

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