High Magnetic Field Studies of the Hidden Order Transition in URu2Si2

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

doi:10.1103/PhysRevLett.89.287201

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High Magnetic Field Studies of the Hidden Order Transition in URu₂Si₂

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Mydosh, J. A.
Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Jaime, M., Kim, K. H., Jorge, G., McCall, S., & Mydosh, J. A. (2002). High Magnetic Field Studies of the Hidden Order Transition in URu₂Si₂. Physical Review Letters, 89(28): 287201, pp. 287201-287201. doi:10.1103/PhysRevLett.89.287201.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0015-30BE-6

Abstract

We studied in detail the low temperature/high magnetic field phases of URu2Si2 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- 0(0)=35.9+/-0.35 T and the appearance of a new phase for magnetic fields in excess of H-1(0)=36.1+/-0.35 T observed 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+/-0.35 T. No phase transitions are observed above 40 T. We discuss our results in the context of itinerant versus localized f electrons.