Direct Observation of Interlayer Josephson Vortices in Heavily Pb-Doped Bi2Sr2CaCu2Oy by Scanning Superconducting Quantum Interference Device Microscopy
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概要
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Josephson vortices trapped in cross-sectional edge surfaces of Pb0.6Bi1.4Sr2CaCu2Oy has been directly observed by using a scanning superconducting quantum interference device (SQUID) microscope. The magnetic field distribution $B_{z}$ around each vortex is substantially anisotropic, compared with the usual vortex in the $ab$-plane, and is extended over 100 μm toward the in-plane direction. By fitting a theoretical $B_{z}$ function to experimental ones, $c$-axis penetration depth $\lambda_{c}$ was estimated to be $11.2 \pm 0.7$ μm, which is in good agreement with the literature value, 12.6 μm, obtained from the Josephson plasma edge frequency.
- 2006-05-25
著者
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Kishio Kohji
Department Of Applied Chemistry Faculty Of Engineering University Of Tokyo
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HASEGAWA Tetsuya
Kanagawa Academy of Science and Technology (KAST)
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KOINUMA Hideomi
National Institute for Materials Science
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KASAI Junpei
Kanagawa Academy of Science and Technology (KAST)
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OKAZAKI Noriaki
National Institute for Materials Science
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Nakayama Yuri
Department Of Superconductivity University Of Tokyo
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Motohashi Teruki
Materials And Structures Laboratory Tokyo Institute Of Technology
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Shimoyama Jun-ichi
Department Of Applied Chemistry School Of Engineering University Of Tokyo
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Matsumoto Yuji
Materials And Structures Laboratory Tokyo Institute Of Technology
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Shimoyama Jun-ichi
Department of Superconductivity, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
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Hasegawa Tetsuya
Kanagawa Academy of Sciences and Technology (KAST), 3-2-1 Sakado, Takatsu-ku, Kawasaki 213-0012, Japan
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Kasai Junpei
Kanagawa Academy of Sciences and Technology (KAST), 3-2-1 Sakado, Takatsu-ku, Kawasaki 213-0012, Japan
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Motohashi Teruki
Materials and Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
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Nakayama Yuri
Department of Superconductivity, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
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Koinuma Hideomi
National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
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Kishio Kohji
Department of Superconductivity, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
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Okazaki Noriaki
National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
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