Details

Autor(en) / Beteiligte

• AMITSUKA, H
• MATSUDA, K
• KAWASAKI, I
• TENYA, K
• YOKOYAMA, M
• SEKINE, C
• TATEIWA, N
• KOBAYASHI, T. C
• KAWARAZAKI, S
• YOSHIZAWA, H

Titel

Pressure-temperature phase diagram of the heavy-electron superconductor URu2Si2

Ist Teil von

• Journal of magnetism and magnetic materials, 2007-03, Vol.310 (2), p.214-220

Ort / Verlag

Amsterdam: Elsevier Science

Erscheinungsjahr

2007

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The pressure-temperature phase diagram of the heavy-electron superconductor URu2Si2 has been reinvestigated by AC-susceptibility and elastic neutron-scattering (NS) measurements performed on a small single-crystalline rod ( in diameter, in length) in a Cu-Be clamp-type high-pressure cell . At ambient pressure, this sample shows the weakest antiferromagnetic (AF) Bragg reflections reported so far, corresponding to the volume-averaged staggered moment of muo0.011muB/U. Under applied pressure, the AF scattering intensity exhibits a sharp increase at at low temperatures. The saturation value of the AF scattering intensity above 0.7GPa corresponds to , which is in good agreement with that observed above 1.5 GPa in our previous NS measurements. The superconductivity is dramatically suppressed by the evolution of AF phase, indicating that the superconducting state coexists only with the hidden order phase. The presence of parasitic ferro- and/or antiferromagnetic phases with transition temperatures , and and their relationship to the low-T ordered phases are also discussed.