Magnetization Properties and Vortex Phase Diagram in CuxTiSe2 Single Crystals

P. Husanikova; J. Fedor; J. Derer; J. Soltys; V. Cambel; M. Iavarone; S. J. May; G. Karapetrov

Magnetization Properties and Vortex Phase Diagram in CuxTiSe2 Single Crystals

Superconductivity 2013-10-08 v1

Authors: P. Husanikova , J. Fedor , J. Derer , J. Soltys , V. Cambel , M. Iavarone , S. J. May , G. Karapetrov

Abstract

We have investigated the magnetization properties and flux dynamics of superconducting Cu $_x$ TiSe $_2$ single crystals within wide range of copper concentrations. We find that the superconducting anisotropy is low and independent on copper concentration ( $\gamma\sim1.7$ ), except in the case of strongly underdoped samples ( $x\leq0.06$ ) that show a gradual increase in anisotropy to $\gamma\sim1.9$ . The vortex phase diagram in this material is characterized by broad region of vortex liquid phase that is unusual for such low- $T_c$ superconductor with low anisotropy. Below the irreversibility line the vortex solid state supports relatively low critical current densities as compared to the depairing current limit ( $J_c/J_0\sim10^{-7}$ ). All this points out that local fluctuations in copper concentration have little effect on bulk pinning properties in this system.

Keywords

single crystal superconductivity vortex matter in superconductors vortex physics in superconductors

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@article{arxiv.1310.1613,
  title  = {Magnetization Properties and Vortex Phase Diagram in CuxTiSe2 Single Crystals},
  author = {P. Husanikova and J. Fedor and J. Derer and J. Soltys and V. Cambel and M. Iavarone and S. J. May and G. Karapetrov},
  journal= {arXiv preprint arXiv:1310.1613},
  year   = {2013}
}

Magnetization Properties and Vortex Phase Diagram in CuxTiSe2 Single Crystals

Abstract

Keywords

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