title: Observation of structures of chain vortices inside anisotropic high- Tc superconductors.
abstract: In order to elucidate the formation mechanism of unconventional arrangements of vortices in high- Tc superconducting thin films at an inclined magnetic field to the layer plane, we investigated the structures of vortex lines inside the films by Lorentz microscopy using our 1-MV field-emission electron microscope. Our observation results concluded that vortex lines are tilted to form linear chains in YBaCu3O(7,8). Vortex lines in the chain-lattice state in Bi2Sr2CaCu2O(8+delta), on the other hand, are all perpendicular to the layer plane, and therefore only vortices lined up along Josephson vortices form chains.
authors.affiliation: Advanced Research Laboratory, Hitachi, Ltd., Hatoyama, Saitama 350-0395, Japan. tonomura@harl.hitachi.co.jp
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authors.lastname: Tonomura
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authors.lastname: Kasai
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authors.lastname: Kamimura
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authors.lastname: Matsuda
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authors.lastname: Harada
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authors.lastname: Yoshida
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authors.lastname: Shimoyama
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authors.lastname: Kishio
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authors.lastname: Hanaguri
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authors.lastname: Kitazawa
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authors.lastname: Masui
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authors.lastname: Tajima
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authors.lastname: Koshizuka
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authors.lastname: Gammel
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authors.lastname: Bishop
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authors.lastname: Sasase
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authors.lastname: Okayasu