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

doi:10.1063/1.2815659

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

Superconductivity 2009-11-13 v1

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

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Abstract

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.

Keywords

scanning SQUID microscope vortex dynamics high-Tc superconductors La_(1.87)Sr_(0.13)CuO_4 vortex pinning flux motion

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@article{arxiv.0708.0695,
  title  = {Direct observation of quantized interlayer vortex flow and vortex pinning distribution in high-Tc La_(1.87)Sr_(0.13)CuO_4 single crystals},
  author = {I. Iguchi and S. Arisawa and T. Uchiyama and K-S. Yun and T. Hatano and I. Tanaka},
  journal= {arXiv preprint arXiv:0708.0695},
  year   = {2009}
}

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16 pages, 4 figures

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

Abstract

Keywords

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