Superconducting Magnetization above the Irreversibility Line in Tl2Ba2CuO6

C. Bergemann; A. W. Tyler; A. P. Mackenzie; J. R. Cooper; S. R. Julian; D. E. Farrell

doi:10.1103/PhysRevB.57.14387

Superconducting Magnetization above the Irreversibility Line in Tl2Ba2CuO6

Superconductivity 2009-10-31 v1

Authors: C. Bergemann , A. W. Tyler , A. P. Mackenzie , J. R. Cooper , S. R. Julian , D. E. Farrell

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Abstract

Piezolever torque magnetometry has been used to measure the magnetization of superconducting Tl2Ba2CuO6. Three crystals with different levels of oxygen overdoping were investigated in magnetic fields up to 10 Tesla. In all cases, the magnetization above the irreversibility line was found to depart from the behaviour M ~ ln(Hc2/H) of a simple London-like vortex liquid. In particular, for a strongly overdoped (Tc = 15K) crystal, the remnant superconducting order above the irreversibility line is characterized by a linear diamagnetic response (M ~ H) that persists well above Tc and also up to the highest field employed.

Keywords

superconducting magnetization irreversibility line torque magnetometry overdoped cuprates vortex liquid diamagnetic response

Cite

@article{arxiv.cond-mat/9801278,
  title  = {Superconducting Magnetization above the Irreversibility Line in Tl2Ba2CuO6},
  author = {C. Bergemann and A. W. Tyler and A. P. Mackenzie and J. R. Cooper and S. R. Julian and D. E. Farrell},
  journal= {arXiv preprint arXiv:cond-mat/9801278},
  year   = {2009}
}

Comments

RevTeX, 11 pages, 7 encapsulated PostScript figures, submitted to Physical Review B

Superconducting Magnetization above the Irreversibility Line in Tl2Ba2CuO6

Abstract

Keywords

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