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首页> 外文会议>8th International Workshop on Critical Currents in Superconductors Kitakyusbu, Japan 27-29 May 1996 >Twin boundary-induced locked and kinked vortex states in YBa_2Cu_3O_(7- delta ) single crystals
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Twin boundary-induced locked and kinked vortex states in YBa_2Cu_3O_(7- delta ) single crystals

机译：YBa_2Cu_3O_（7- delta）单晶中孪晶边界诱导的锁定和扭结涡态

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摘要

The magnetic moments parallel and perpendicular to the c-axis (measured simultaneously) have been studied as a function of direction of applied magnetic field H in twinned and de-twinned YBa_2Cu_3O_(7- delta ) single crystals. They show pronounced anomalies when the field direction approaches the c-axis. These allow clear identification of the angle phi _L at which vortices are locked into twin planes. Complete shielding of the H_(ab) field component (transverse Meissner effect) was observed in the locked state. For larger angles, up to phi _T, the vortices continue to be non-collinear with the applied field, but their direction deviates from the trapping plane, phi _L exhibits a 1/H field-dependence, whereas phi _T shows only weak logarithmic variations with H.
机译：已经研究了孪晶和孪晶的YBa_2Cu_3O_（7-delta）单晶中平行于c轴和垂直于c轴（同时测量）的磁矩与施加磁场H的方向的关系。当场方向接近c轴时，它们显示出明显的异常。这些可以清楚地确定涡旋被锁定在双平面中的角度。在锁定状态下，观察到H_（ab）场分量的完全屏蔽（横向迈斯纳效应）。对于更大的角度，直到phi _T，旋涡仍与所施加的场不共线，但其方向偏离俘获平面，phi _L表现出1 / H场相关性，而phi _T则仅表现出微弱的对数变化与H.

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