Oscillating Rows of Vortices in Superconductors

Superconductors can be used as dissipation-free electrical conductors as long as vortices are pinned. Vortices in high-temperature superconductors, however, behave anomalously, reflecting the anisotropic layered structure, and can move readily, thus preventing their practical use. Specifically, in a...

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 2001-12, Vol.294 (5549), p.2136-2138
Main Authors: Matsuda, T., Kamimura, O., Kasai, H., Harada, K., Yoshida, T., Akashi, T., Tonomura, A., Nakayama, Y., Shimoyama, J., Kishio, K., Hanaguri, T., Kitazawa, K.
Format: Article
Language:English
Subjects:
Analysis
Biological and medical sciences
Climate
Crystal lattices
Electron beams
Fundamental and applied biological sciences. Psychology
Geometric lines
Image contrast
Magnetic fields
Materials science
Molecular and cellular biology
Molecules
Observation
Oscillation
Paleoclimatology
Physics
Superconductivity
Superconductors
Temperature
Thin films
Vortex motion
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Summary:Superconductors can be used as dissipation-free electrical conductors as long as vortices are pinned. Vortices in high-temperature superconductors, however, behave anomalously, reflecting the anisotropic layered structure, and can move readily, thus preventing their practical use. Specifically, in a magnetic field tilted toward the layer plane, a special vortex arrangement (chain-lattice state) is formed. Real-time observation of vortices using high-resolution Lorentz microscopy revealed that the images of chain vortices begin to disappear at a much lower temperature, Td, than the superconducting transition temperature, Tc. We attribute this image disappearance to the longitudinal oscillation of vortices along the chains.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.1065968