Direct Observation of Magnetic Flux Behavior in High-Tc Oxide Superconductors

S. Gotoh; N. Koshizuka; M. Yoshida; H. Fujimoto; M. Murakami; H. Izumi; K. Ohata

doi:10.1109/TJMJ.1992.4565442

Direct Observation of Magnetic Flux Behavior in High-Tc Oxide Superconductors

S. Gotoh, N. Koshizuka, M. Yoshida, H. Fujimoto, M. Murakami, H. Izumi, K. Ohata

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

Abstract

The magnetic flux behavior in YBa2Cu3Ox specimens under various applied fields was observed at 10K and 77K using the Faraday effect of an iron garnet film with stripe magnetic domains. The magnetic flux distribution was determined by optical observation of the domain structure in the iron garnet film placed on the sample. The magnetic flux gradients in a crystal fabricated by the Melt-Powder-Melt-Growth (MPMG) method and in a thin film were in good agreement with those predicted by the critical state model at both 10K and 77K. On the other hand, in a sintered sample the flux penetrated through the superconducting weak-link regions, and no flux gradient was observed at 77K.

Original language	English
Pages (from-to)	525-532
Number of pages	8
Journal	IEEE Translation Journal on Magnetics in Japan
Volume	7
Issue number	7
DOIs	https://doi.org/10.1109/TJMJ.1992.4565442
Publication status	Published - 1992 Jul

ASJC Scopus subject areas

Engineering (miscellaneous)
Engineering(all)

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@article{e43c8d33a75045ee821b25219b3d01ae,

title = "Direct Observation of Magnetic Flux Behavior in High-Tc Oxide Superconductors",

abstract = "The magnetic flux behavior in YBa2Cu3Ox specimens under various applied fields was observed at 10K and 77K using the Faraday effect of an iron garnet film with stripe magnetic domains. The magnetic flux distribution was determined by optical observation of the domain structure in the iron garnet film placed on the sample. The magnetic flux gradients in a crystal fabricated by the Melt-Powder-Melt-Growth (MPMG) method and in a thin film were in good agreement with those predicted by the critical state model at both 10K and 77K. On the other hand, in a sintered sample the flux penetrated through the superconducting weak-link regions, and no flux gradient was observed at 77K.",

author = "S. Gotoh and N. Koshizuka and M. Yoshida and H. Fujimoto and M. Murakami and H. Izumi and K. Ohata",

note = "Funding Information: The authors received the assistance of Dr. Y. YokoyamaoftheElectrotechnicalLaboratoryin preparing the iron garnet thin films used in this work,theyexpressforwhichtheirthanks.This research was supported by NEDO under the man¬ agementoftheR&DofBasicTechnologyfor Future Zudustries.",

year = "1992",

month = jul,

doi = "10.1109/TJMJ.1992.4565442",

language = "English",

volume = "7",

pages = "525--532",

journal = "IEEE Translation Journal on Magnetics in Japan",

issn = "0882-4959",

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T1 - Direct Observation of Magnetic Flux Behavior in High-Tc Oxide Superconductors

AU - Gotoh, S.

AU - Koshizuka, N.

AU - Yoshida, M.

AU - Fujimoto, H.

AU - Murakami, M.

AU - Izumi, H.

AU - Ohata, K.

N1 - Funding Information: The authors received the assistance of Dr. Y. YokoyamaoftheElectrotechnicalLaboratoryin preparing the iron garnet thin films used in this work,theyexpressforwhichtheirthanks.This research was supported by NEDO under the man¬ agementoftheR&DofBasicTechnologyfor Future Zudustries.

PY - 1992/7

Y1 - 1992/7

N2 - The magnetic flux behavior in YBa2Cu3Ox specimens under various applied fields was observed at 10K and 77K using the Faraday effect of an iron garnet film with stripe magnetic domains. The magnetic flux distribution was determined by optical observation of the domain structure in the iron garnet film placed on the sample. The magnetic flux gradients in a crystal fabricated by the Melt-Powder-Melt-Growth (MPMG) method and in a thin film were in good agreement with those predicted by the critical state model at both 10K and 77K. On the other hand, in a sintered sample the flux penetrated through the superconducting weak-link regions, and no flux gradient was observed at 77K.

AB - The magnetic flux behavior in YBa2Cu3Ox specimens under various applied fields was observed at 10K and 77K using the Faraday effect of an iron garnet film with stripe magnetic domains. The magnetic flux distribution was determined by optical observation of the domain structure in the iron garnet film placed on the sample. The magnetic flux gradients in a crystal fabricated by the Melt-Powder-Melt-Growth (MPMG) method and in a thin film were in good agreement with those predicted by the critical state model at both 10K and 77K. On the other hand, in a sintered sample the flux penetrated through the superconducting weak-link regions, and no flux gradient was observed at 77K.

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