MICROWAVE PROPAGATION THROUGH SUPERCONDUCTOR-POLYMER COMPOSITES

被引：15

作者：

GOLOSOVSKY, M

TSINDLEKHT, M

DAVIDOV, D

机构：

[1] Racah Institute of Physics, Hebrew University of Jerusalem

来源：

PHYSICAL REVIEW B | 1992年 / 46卷 / 18期

关键词：

D O I：

10.1103/PhysRevB.46.11439

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report on microwave and low-frequency properties of composites consisting of YBa2Cu3O7-x (YBCO) or Bi2Sr2CaCu2Ox grains embedded in a polymer matrix with strong emphasis on microwave transmission experiments through YBCO-polymer composites. The low-frequency conductivity vs the YBCO volume fraction f can be described by a three-dimensional percolation model with a percolation threshold of f(p) congruent-to 0.2. The microwave phase velocity and the transmission coefficient are significantly larger in the superconducting state of the grains compared to their normal-state values. These parameters are sensitive to the external magnetic field in the superconducting state. The increase of the phase velocity in the superconducting state is attributed to the change of the effective magnetic permeability which is in conflict with previous theoretical predictions.

引用

页码：11439 / 11444

页数：6

共 24 条

[1]

[Anonymous], 2002, ELECTRODYNAMICS CONT

[2] MICROWAVE CONDUCTIVITY OF POWDERED UNALIGNED YBA2CU3O7-DELTA [J].