Abstract
We succeeded in growing high quality single crystals of URu 2Si2 and performed thermal expansion measurements under pressure. Applying a magnetic field along the [001] direction in the tetragonal structure, the so-called hidden-order phase reappears after the suppression of the antiferromagnetic phase above the critical pressure Px. We determined the pressure-temperature-field phase diagram for the paramagnetic, hidden-order and antiferromagnetic states for the H ∥ [001] direction. We also present the temperature dependence of the upper critical field H c2 for and H ∥ [001] and [100] determined by the AC specific heat measurements, corresponding to the bulk superconductivity in a high quality single crystal.
Original language | English |
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Article number | 164205 |
Journal | Journal of Physics Condensed Matter |
Volume | 22 |
Issue number | 16 |
DOIs | |
State | Published - 2010 |
Externally published | Yes |