Observation of a first-order phase transition deep within the vortex-solid region of YBa2Cu3O7

M. Reibelt; S. Weyeneth; A. Erb; A. Schilling

doi:10.1088/0953-2048/24/10/105019

Observation of a first-order phase transition deep within the vortex-solid region of YBa2Cu3O7

Superconductivity 2011-10-04 v6

Authors: M. Reibelt , S. Weyeneth , A. Erb , A. Schilling

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Abstract

We have investigated the magnetic phase diagram of a fully oxygenated detwinned YBa2Cu3O7 single crystal by means of magneto-caloric and magnetization measurements, and found thermodynamic evidence for a temperature dependent first-order phase-transition line deep within the vortex-solid region. The associated discontinuities in the entropy are apparently proportional to the magnetic flux density, which may hint at a structural transition of the vortex lattice.

Keywords

vortex physics in superconductors vortex matter in superconductors magnetic phase transitions

Cite

@article{arxiv.1003.4688,
  title  = {Observation of a first-order phase transition deep within the vortex-solid region of YBa2Cu3O7},
  author = {M. Reibelt and S. Weyeneth and A. Erb and A. Schilling},
  journal= {arXiv preprint arXiv:1003.4688},
  year   = {2011}
}

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