中国物理B ›› 2001, Vol. 10 ›› Issue (3): 229-233.doi: 10.1088/1009-1963/10/3/311

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INFLUENCE OF PINNING CENTRE DISTRIBUTION ON THE DYNAMICS OF TWO-DIMENSIONAL VORTEX SYSTEM

任清褒1, 罗孟波2, 焦正宽2, 陈庆虎2   

  1. (1)Department of Physics, Lishui Teacher College, Lishui 323000, China; (2)Department of Physics, Zhejiang University, Hangzhou 310027, China
  • 收稿日期:2000-10-13 出版日期:2001-03-15 发布日期:2005-06-12
  • 基金资助:
    Project supported by the Ministry of Science and Technology of China (NKBRSF-G19990646) and the Provincial Scientific Foundation of Zhejiang, China (199031).

INFLUENCE OF PINNING CENTRE DISTRIBUTION ON THE DYNAMICS OF TWO-DIMENSIONAL VORTEX SYSTEM

Luo Meng-bo (罗孟波)a, Jiao Zheng-kuan (焦正宽)a, Ren Qing-bao (任清褒)b, Chen Qing-hu (陈庆虎)a   

  1. a Department of Physics, Zhejiang University, Hangzhou 310027, China; b Department of Physics, Lishui Teacher College, Lishui 323000, China
  • Received:2000-10-13 Online:2001-03-15 Published:2005-06-12
  • Supported by:
    Project supported by the Ministry of Science and Technology of China (NKBRSF-G19990646) and the Provincial Scientific Foundation of Zhejiang, China (199031).

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摘要： Numerical study of the influence of the distribution of pinning centres on the dynamics of a two-dimensional vortex system is performed. The superconductor sample has a periodic structure with a pinned region of length Lp and an unpinned region of length Lx-Lp along the direction of driving force (Lorentz force). Results show that, at zero temperature, the critical force Fc increases with the increase of Lp, indicating that the homogeneity of pinning centres helps to enhance the critical electric current of the superconductor. At large driving forces, vortex static channels form in the pinned region even for Lpx.

Abstract: Numerical study of the influence of the distribution of pinning centres on the dynamics of a two-dimensional vortex system is performed. The superconductor sample has a periodic structure with a pinned region of length Lp and an unpinned region of length Lx-Lp along the direction of driving force (Lorentz force). Results show that, at zero temperature, the critical force Fc increases with the increase of Lp, indicating that the homogeneity of pinning centres helps to enhance the critical electric current of the superconductor. At large driving forces, vortex static channels form in the pinned region even for Lp < Lx.

Key words: pinning, vortex lattice, dynamics

中图分类号: 

  • 74.25.Qt
74.25.Sv (Critical currents) 74.20.-z (Theories and models of superconducting state)