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Pressure dependence of magnetism in URu2Si2

F. Bourdarot·B. Fak·V. P. Mineev·M. E. Zhitomirsky·N. Kernavanois·S. Raymond·P. Burlet·F. Lapierre·P. Lejay·J. Flouquet
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Abstract

Neutron-scattering and specific-heat measurements of the heavy-fermion superconductor URu2Si2 under hydrostatic pressure and with Rh-doping [U(Ru{0.98}Rh{0.02})2Si2] show the existence of two magnetic phase transitions. At the second-order phase transition Tm ≈ 17.5 K, a tiny ordered moment is established, while at TM < Tm, a first-order phase transition (under pressure or doping) gives rise to a large moment. The results can be understood in terms of a hidden OP Psi coupled to the ordered moment m, where m and Psi have the same symmetry.

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F. Bourdarot, B. Fak, V. P. Mineev, M. E. Zhitomirsky, N. Kernavanois, S. Raymond, P. Burlet, F. Lapierre, P. Lejay, J. Flouquet. 2003-12-08. Pressure dependence of magnetism in URu2Si2. https://arxiv.org/abs/cond-mat/0312206

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