Quantitative analysis of current density distributions from magneto-optical images of superconducting YBa2Cu3O7-δ thin films

I. B. Rutel; C. McIntosh; A. Caruso; M. W. Davidson; J. Schwartz

doi:10.1088/0953-2048/17/5/034

Quantitative analysis of current density distributions from magneto-optical images of superconducting YBa₂Cu₃O_7-δ thin films

I. B. Rutel, C. McIntosh, A. Caruso, M. W. Davidson, J. Schwartz

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9 Scopus citations

Abstract

The magneto-optical imaging technique is applied to YBa₂Cu ₃O_7-δ (YBCO) thin film coated conductors, providing a visual investigation of sub-millimetre aberrations and fracture defects. The further application of post-processing techniques provides a quantitative analysis of varying patterns resulting from field penetration in the YBCO coated conductor investigations. Application of theory provides critical current information for geometries where the conduction path is perpendicular to the applied field in micro-bridge samples. A Maxwell curl calculation is performed on the intensity distribution of various images. These calculations reveal boundaries for current paths via relative screening current determination and striations.

Original language	English (US)
Pages (from-to)	S269-S273
Journal	Superconductor Science and Technology
Volume	17
Issue number	5
DOIs	https://doi.org/10.1088/0953-2048/17/5/034
State	Published - May 2004

All Science Journal Classification (ASJC) codes

Ceramics and Composites
Condensed Matter Physics
Metals and Alloys
Electrical and Electronic Engineering
Materials Chemistry

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10.1088/0953-2048/17/5/034

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abstract = "The magneto-optical imaging technique is applied to YBa2Cu 3O7-δ (YBCO) thin film coated conductors, providing a visual investigation of sub-millimetre aberrations and fracture defects. The further application of post-processing techniques provides a quantitative analysis of varying patterns resulting from field penetration in the YBCO coated conductor investigations. Application of theory provides critical current information for geometries where the conduction path is perpendicular to the applied field in micro-bridge samples. A Maxwell curl calculation is performed on the intensity distribution of various images. These calculations reveal boundaries for current paths via relative screening current determination and striations.",

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AU - Caruso, A.

AU - Davidson, M. W.

AU - Schwartz, J.

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AB - The magneto-optical imaging technique is applied to YBa2Cu 3O7-δ (YBCO) thin film coated conductors, providing a visual investigation of sub-millimetre aberrations and fracture defects. The further application of post-processing techniques provides a quantitative analysis of varying patterns resulting from field penetration in the YBCO coated conductor investigations. Application of theory provides critical current information for geometries where the conduction path is perpendicular to the applied field in micro-bridge samples. A Maxwell curl calculation is performed on the intensity distribution of various images. These calculations reveal boundaries for current paths via relative screening current determination and striations.

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Quantitative analysis of current density distributions from magneto-optical images of superconducting YBa₂Cu₃O_7-δ thin films

Abstract

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