High-Resolution Analysis of Currents at Low-Angle Grain Boundaries in YBCO Thin Films Using Magnetooptics and Magnetic X-Ray Microscopy

Stephen Ruoss; Claudia Stahl; Jonas Bayer; Gisela Schutz; Joachim Albrecht; Francesco Laviano

doi:10.1109/TASC.2016.2549180

High-Resolution Analysis of Currents at Low-Angle Grain Boundaries in YBCO Thin Films Using Magnetooptics and Magnetic X-Ray Microscopy

Stephen Ruoss, Claudia Stahl, Jonas Bayer, Gisela Schutz, Joachim Albrecht, Francesco Laviano

Research output: Contribution to journal › Article › peer-review

Abstract

Current transport in high-temperature superconductors is strongly affected by the presence of grain boundaries (GBs). Thin epitaxial films of high-temperature superconducting YBa₂Cu₃O_7-δ containing low-angle GBs with fixed angles of 5° have been prepared on bicrystalline substrates. The current-carrying capability of these GBs is investigated by quantitative magnetooptical imaging; the results are compared with novel magnetic X-ray microscopy images. We find that not only the misorientation angle of the GB but also the macroscopic geometry of the current path has substantial influence on the critical current. On small length scales, inhomogeneities of the GB behavior are found. A detailed analysis requires investigations with the highest spatial resolution which can be offered by X-ray microscopy.

Original language	English
Article number	7445850
Journal	IEEE Transactions on Applied Superconductivity
Volume	26
Issue number	3
DOIs	https://doi.org/10.1109/TASC.2016.2549180
State	Published - Apr 2016
Externally published	Yes

Keywords

Critical current density
farraday effect
high-temperature superconductors
magnetic films
magnetics
magnetooptic effect
superconducting films-thin films
superconducting materials
superconductivity
Yttrium barium copper oxide

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10.1109/TASC.2016.2549180

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title = "High-Resolution Analysis of Currents at Low-Angle Grain Boundaries in YBCO Thin Films Using Magnetooptics and Magnetic X-Ray Microscopy",

abstract = "Current transport in high-temperature superconductors is strongly affected by the presence of grain boundaries (GBs). Thin epitaxial films of high-temperature superconducting YBa2Cu3O7-δ containing low-angle GBs with fixed angles of 5° have been prepared on bicrystalline substrates. The current-carrying capability of these GBs is investigated by quantitative magnetooptical imaging; the results are compared with novel magnetic X-ray microscopy images. We find that not only the misorientation angle of the GB but also the macroscopic geometry of the current path has substantial influence on the critical current. On small length scales, inhomogeneities of the GB behavior are found. A detailed analysis requires investigations with the highest spatial resolution which can be offered by X-ray microscopy.",

keywords = "Critical current density, farraday effect, high-temperature superconductors, magnetic films, magnetics, magnetooptic effect, superconducting films-thin films, superconducting materials, superconductivity, Yttrium barium copper oxide",

author = "Stephen Ruoss and Claudia Stahl and Jonas Bayer and Gisela Schutz and Joachim Albrecht and Francesco Laviano",

note = "Publisher Copyright: {\textcopyright} 2016 IEEE.",

year = "2016",

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doi = "10.1109/TASC.2016.2549180",

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T1 - High-Resolution Analysis of Currents at Low-Angle Grain Boundaries in YBCO Thin Films Using Magnetooptics and Magnetic X-Ray Microscopy

AU - Ruoss, Stephen

AU - Stahl, Claudia

AU - Bayer, Jonas

AU - Schutz, Gisela

AU - Albrecht, Joachim

AU - Laviano, Francesco

PY - 2016/4

Y1 - 2016/4

N2 - Current transport in high-temperature superconductors is strongly affected by the presence of grain boundaries (GBs). Thin epitaxial films of high-temperature superconducting YBa2Cu3O7-δ containing low-angle GBs with fixed angles of 5° have been prepared on bicrystalline substrates. The current-carrying capability of these GBs is investigated by quantitative magnetooptical imaging; the results are compared with novel magnetic X-ray microscopy images. We find that not only the misorientation angle of the GB but also the macroscopic geometry of the current path has substantial influence on the critical current. On small length scales, inhomogeneities of the GB behavior are found. A detailed analysis requires investigations with the highest spatial resolution which can be offered by X-ray microscopy.

AB - Current transport in high-temperature superconductors is strongly affected by the presence of grain boundaries (GBs). Thin epitaxial films of high-temperature superconducting YBa2Cu3O7-δ containing low-angle GBs with fixed angles of 5° have been prepared on bicrystalline substrates. The current-carrying capability of these GBs is investigated by quantitative magnetooptical imaging; the results are compared with novel magnetic X-ray microscopy images. We find that not only the misorientation angle of the GB but also the macroscopic geometry of the current path has substantial influence on the critical current. On small length scales, inhomogeneities of the GB behavior are found. A detailed analysis requires investigations with the highest spatial resolution which can be offered by X-ray microscopy.

KW - Critical current density

KW - farraday effect

KW - high-temperature superconductors

KW - magnetic films

KW - magnetics

KW - magnetooptic effect

KW - superconducting films-thin films

KW - superconducting materials

KW - superconductivity

KW - Yttrium barium copper oxide

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JO - IEEE Transactions on Applied Superconductivity

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ER -

High-Resolution Analysis of Currents at Low-Angle Grain Boundaries in YBCO Thin Films Using Magnetooptics and Magnetic X-Ray Microscopy

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Keywords

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