Anisotropy in Magnetic Hysteresis of BSr2Can-1CunO2n+3 (n=3, 4, 5) Superconductors
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概要
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We investigated the anisotropy of magnetization hysteresis ΔM at various temperatures for magnetically grain aligned samples of BSr2Can-1CunO2n+3 [B-12(n-1)n, n=3, 4, 5] superconductors. In the low-temperature region, ΔM|| with magnetic field parallel to the c-axis is larger than ΔM⊥ with magnetic field perpendicular to the c-axis. When temperature is increased, crossover between ΔM|| and ΔM⊥ occurs at a certain magnetic field, i.e., ΔM||<ΔM⊥ for an applied field higher than the critical value. This crossover was observed for all members of the series and seems to be caused by different vortex structures corresponding to magnetic fields parallel and perpendicular to the c-axis. In-plane critical current density and irreversibility field corresponding to it were calculated from ΔM||. Their temperature variations suggest B-1223<B-1245<B-1234 as the order of anisotropy of electronic structures.
- INSTITUTE OF PURE AND APPLIED PHYSICSの論文
- 1998-10-15
著者
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UCHIDA Yoshishige
National Institute for Research in Inorganic Materials
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YU Shan
National Institute for Research in Inorganic Materials (NIRIM)
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KAWASHIMA Tetsuya
National Institute for Research in Inorganic Materials (NIRIM)
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Takayama-muromachi Eiji
National Institute For Materials Science (nims)
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Takayama-Muromachi Eiji
National Institute for Research in Inorganic Materials (NIRIM), 1-1 Namiki, Tsukuba,
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Yu Shan
National Institute for Research in Inorganic Materials (NIRIM), 1-1 Namiki, Tsukuba,
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Kawashima Tetsuya
National Institute for Research in Inorganic Materials (NIRIM), 1-1 Namiki, Tsukuba,
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