Rigid vortices in MgB2

Hao Jin; Hai-Hu Wen; Hai-Peng Yang; Zhi-Yong Liu; Zhi-An Ren; Guang-Can Che; Zhong-Xian Zhao

doi:10.1063/1.1613035

Rigid vortices in MgB2

Superconductivity 2017-03-23 v2

Authors: Hao Jin , Hai-Hu Wen , Hai-Peng Yang , Zhi-Yong Liu , Zhi-An Ren , Guang-Can Che , Zhong-Xian Zhao

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Abstract

Magnetic relaxation of high-pressure synthesized MgB $_2$ bulks with different thickness is investigated. It is found that the superconducting dia-magnetic moment depends on time in a logarithmic way; the flux-creep activation energy decreases linearly with the current density (as expected by Kim-Anderson model); and the activation energy increases linearly with the thickness of sample when it is thinner than about 1 mm. These features suggest that the vortices in the MgB $_2$ are rather rigid, and the pinning and creep can be well described by Kim-Anderson model.

Keywords

vortex matter in superconductors mgb2 superconductivity vortex physics in superconductors

Cite

@article{arxiv.cond-mat/0303446,
  title  = {Rigid vortices in MgB2},
  author = {Hao Jin and Hai-Hu Wen and Hai-Peng Yang and Zhi-Yong Liu and Zhi-An Ren and Guang-Can Che and Zhong-Xian Zhao},
  journal= {arXiv preprint arXiv:cond-mat/0303446},
  year   = {2017}
}

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Typo corrected & reference added

Rigid vortices in MgB2

Abstract

Keywords

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