Pressure dependence of magnetism in URu2Si2

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

arxiv: cond-mat/0312206 · v1 · submitted 2003-12-08 · ❄️ cond-mat.str-el

Pressure dependence of magnetism in URu2Si2

F. Bourdarot , B. Fak , V.P. Mineev , M.E. Zhitomirsky , N. Kernavanois , S. Raymond , P. Burlet , F. Lapierre

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P. Lejay J. Flouquet

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classification ❄️ cond-mat.str-el

keywords momentphasepressureorderedtransitionunderuru2si2coupled

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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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Pressure dependence of magnetism in URu2Si2

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