Possible formation of rectangular Josephson-vortex lattice in narrow Bi-2212 intrinsic Josephson junctions by the enhanced edge effect

被引:1
作者
Hatano, T
Kawakami, S
Kim, SM
Urayama, S
Inomata, K
Nagao, M
Kim, SJ
Wang, HB
Yun, KS
Takano, Y
Ishii, A
Arisawa, S
Yamashita, T
Tachiki, M
机构
[1] Natl Inst Mat Sci, Nano Quantum Elect Grp, Nanomat Lab, Tsukuba, Ibaraki 3050047, Japan
[2] Tokyo Univ Sci, Dept Phys, Noda, Chiba 2788510, Japan
[3] Tohoku Univ, Res Inst Elect Commun, Sendai, Miyagi 9808577, Japan
[4] Jeju Natl Univ, Dept Mech Engn, Jeju Do 690756, South Korea
关键词
superconductivity; magnetic properties;
D O I
10.1016/j.jpcs.2005.10.077
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Josephson vortex lattice in narrow Bi-2212 intrinsic Josephson junctions have been studied. Formation of rectangular Josephson vortex lattice is expected in narrow width due to the edge effect. Current-voltage (I-V) characteristics were measured as a function of the magnetic field applied parallel to their a-b planes. Maximum zero bias current (I-C.branch) and flux-flow voltage were measured. We observed that the I-C.branch monotonically decreased with magnetic field up to 0.6 T. Above 0.6 T, I-C.branch showed an enhancement, accompanied by an enhancement of flux-flow voltage thus flux-flow speed, up to 1.0 T. This result indicates a change in the configuration of vortex lattices from triangular to other structure (possibly rectangular) by the edge effect in which configuration both the flux-flow voltage and I-C.branch are enhanced due to an increase in the maximum velocity of the vortex lattice. (c) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码:365 / 368
页数:4
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