High Field Studies of the Hidden Order Transition in URu$_2$Si$_2$

M. Jaime; K. H. Kim; G. Jorge; S. McCall; J. A Mydosh

doi:10.1103/PhysRevLett.89.287201

paper

High Field Studies of the Hidden Order Transition in URu $_{2}$ Si $_{2}$

arXiv:cond-mat/0209500 · doi:10.1103/PhysRevLett.89.287201

Abstract

We studied in detail the low temperature/high magnetic field phases of URu $_{2}$ Si $_{2}$ single crystals with specific heat, magnetocaloric effect, and magnetoresistance in magnetic fields up to 45 T. Data obtained down to 0.5 K, and extrapolated to T = 0, show a suppression of the hidden order phase at H $_{o}$ (0) = 35.9 $\pm$ 0.35 T and the appearance of a new phase for magnetic fields in excess of H $_{1}$ (0) = 36.1 $\pm$ 0.35 T observed \textit{only} at temperatures lower than 6 K. In turn, complete suppression of this high field state is attained at a critical magnetic field H $_{2}$ (0) = 39.7 $\pm$ 0.35 T. No phase transitions are observed above 40 T. We discuss our results in the context of itinerant vs. localized \textit{f}-electron behavior and consider the implications for the hidden order phase.

4 pages, 3 figures Submitted May 10, 2002. Revised Sep 17, 2002

High Field Studies of the Hidden Order Transition in URu2​Si2​

Abstract

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High Field Studies of the Hidden Order Transition in URu $_{2}$ Si $_{2}$