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

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

2010-03-24

arxiv.org/abs/1003.4688v6

Supercond. Sci. Technol. 24, 105019 (2011)

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1088/0953-2048/24/10/105019

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.

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