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arXiv 0708.0695cond-mat.supr-con
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高Tc La_(1.87)Sr_(0.13)CuO_4单晶中量子化层间涡旋流和涡旋钉扎分布的直接观察

Direct observation of quantized interlayer vortex flow and vortex pinning distribution in high-Tc La_(1.87)Sr_(0.13)CuO_4 single crystals

I. Iguchi, S. Arisawa, T. Uchiyama, K-S. Yun, T. Hatano, I. Tanaka

摘要:

利用超导量子干涉仪(SQUID)扫描显微镜(SSM)研究了各向异性高Tc La_(1.87)Sr_(0.13)CuO_4单晶中由洛伦兹力引起的层间量子化涡旋动态运动的磁成像。研究发现,磁通运动的3种模式依赖于传输电流的切换。通过增加电流,观察到从涡的蠕变样行为到稳定的涡流的过渡。更高的电流引起的涡流面积的持续扩大,表明各种钉扎中心的不均匀分布。

英文摘要:

A scanning superconducting quantum interference device (SQUID) microscope (SSM) is used to study the magnetic imaging of dynamic motion of quantized interlayer vortices induced by the Lorentz force in anisotropic high-Tc La_(1.87)Sr_(0.13)CuO_4 single crystals. It is found that 3 modes of flux motion switch depending on the transport current. By increasing the current a transition from the creep-like behavior of vortices to a steady flow of vortices was observed. Even higher current induced a continuous expansion of vortex-flow area indicating an inhomogeneous distribution of various pinning centers.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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