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28 March 2024
 
  » arxiv » cond-mat/0311511

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Microwave Current Imaging in Passive HTS Components by Low-Temperature Laser Scanning Microscopy (LTLSM)
A. P. Zhuravel ; Steven M. Anlage ; A. V. Ustinov ;
Date 21 Nov 2003
Subject Superconductivity; Materials Science | cond-mat.supr-con cond-mat.mtrl-sci
AbstractWe have used the LTLSM technique for a spatially resolved investigation of the microwave transport properties, nonlinearities and material inhomogeneities in an operating coplanar waveguide YBa_2Cu_3O_{7-delta} (YBCO) microwave resonator on an LaAlO_3 (LAO) substrate. The influence of twin-domain blocks, in-plane rotated grains, and micro-cracks in the YBCO film on the nonuniform rf current distribution were measured with a micrometer-scale spatial resolution. The impact of the peaked edge currents and rf field penetration into weak links on the linear device performance were studied as well. The LTLSM capabilities and its future potential for non-destructive characterization of the microwave properties of superconducting circuits are discussed.
Source arXiv, cond-mat/0311511
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