High-magnetic field magnetostriction and thermal expansion in URu2Si2
Abstract
We report high magnetic field (up to μ0H = 45 T) c-axis thermal expansion and magnetostriction experiments on URu2Si2 single crystals. The sample length change ΔLc(THO)/Lc associated with the transition to the ``hidden order'' phase becomes increasingly discontinous as the magnetic field is raised above 25 T. The re-entrant ordered phase III is clearly observed in both the thermal expansion ΔLc(T)/Lcand magnetostrictionΔLc(B)/Lc above 36 T, in good agreement with previous results. The sample length is also discontinous at the boundaries of this phase, mainly at the upper boundary. A change in the sign of the coefficient of thermal-expansion is observed at the metamagnetic transition (BM ? 38 T) which is likely related to the existence of a quantum critical end point. See V.F. Correa et al., Phys. Rev. Lett. (in the press).
- Publication:
-
APS March Meeting Abstracts
- Pub Date:
- March 2013
- Bibcode:
- 2013APS..MARG19012C