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Jpn. J. Appl. Phys. 44 (2005) pp. L27-L30  |Previous Article| |Next Article|  |Table of Contents|
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Letter

Lock-in Phenomena of Josephson Vortices under Vicinal Layer Parallel Magnetic Field

Takeshi Hatano1,2,, Sunmi Kim1, Shinya Urayama1,2, Huabing Wang1, Kunihiro Inomata1,3, Masanori Nagao1, Kyungsung Yun1, Takeshi Kawae1, Yoshihiko Takano1, Masashi Tachiki1 and Tsutomu Yamashita1

1Nanomaterials Laboratory, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan
2Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
3Research Institute of Electrical Communications, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japan

(Received September 30, 2004; accepted October 21, 2004; published December 10, 2004)

The lock-in phenomena of Josephson vortices have been studied under the vicinal layer parallel magnetic field in a field cooling experiment. As a sign of the lock-in state, Josephson vortex-flow voltage was measured with c-axis bias current in an in-line type intrinsic Josephson junction formed on a single-crystal Bi2Sr2CaCu2O8+δ superconductor. On cooling, vortex-flow voltage appears at the lock-in transition of the vortices which takes place at the temperature T when the lower critical field Hc1(T) grows as high as the c-axis component of the magnetic field. This can be understood as the pancake vortices being expelled from the superconducting double CuO2 layers by the Meissner effect. The temperature dependence of Hc1(T) was observed by the lock-in transition at various offset angles.

URL: http://jjap.jsap.jp/link?JJAP/44/L27/
DOI: 10.1143/JJAP.44.L27


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