What is it about?
Vortex pinning by linear crystalline defects is one effective way to improve the zero-resistivity current performance of high temperature superconducting films under the magnetic field perpendicular to the film surface. We have shown for the first time that the vortex pinning mechanism by linear crystalline defects differs between magnetic fields parallel and perpendicular to the surface of high-temperature superconducting thin films. Introducing linear crystalline defects in the direction nearly parallel to the film surface has been challenging so far. We confirmed the effective configuration of linear crystalline defects on vortex pinning in the film surface direction, through the systematic study using swift heavy-ion beams.
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Why is it important?
Our findings in this study demonstrate one approach for effective vortex pinning in high-temperature superconducting thin films under a magnetic field direction parallel to the film surface. This is beneficial particularly for superconducting magnet applications, where high performance of zero-resistivity current is required for both magnetic field directions parallel and perpendicular to the film surface.
Perspectives
Writing this article was a great pleasure as it has co-authors with whom I have had long standing collaborations concerning research on the modification of high-temperature superconducting materials through heavy-ion irradiation. I hope this article provides one part of the research that promotes the application of high-temperature superconducting materials and makes a sustainable society.
Tetsuro Sueyoshi
Kyushu Sangyo Daigaku
Read the Original
This page is a summary of: Novel strategy for improving anisotropic critical current density of YBa2Cu3Oy films through ab-plane oriented columnar defects, Journal of Applied Physics, September 2025, American Institute of Physics,
DOI: 10.1063/5.0293955.
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