Anisotropic physical properties of single-crystal U2Rh2Sn in high magnetic fields

Article

关键词: ACTINIDE;    SUPERCONDUCTIVITY;    DIFFRACTION;    DENSITY;    STATE;    T=CO;    X=IN;    RH;    NI;    IR;   

DOI  :  10.1103/PhysRevB.95.174433

来源: SCIE

【 摘 要 】

We report on the crystal and magnetic structures, magnetic, transport, and thermal properties of U2Rh2Sn single crystals studied in part in high magnetic fields up to 58 T. The material adopts a U3Si2-related tetragonal crystal structure and orders antiferromagnetically below T-N = 25 K. The antiferromagnetic structure is characterized by a propagation vector k = (001/2). The magnetism in U2Rh2Sn is found to be associated mainly with 5f states. However, both unpolarized and polarized neutron experiments reveal at low temperatures in zero field non-negligible magnetic moments also on Rh sites. U moments of 0.50(2) mu(B) are directed along the tetragonal axis while Rh moments of 0.06(4) mu(B) form a noncollinear arrangement confined to the basal plane. The response to applied magnetic field is highly anisotropic. Above similar to 15 K the easy magnetization direction is along the tetragonal axis. At lower temperatures, however, a stronger response is found perpendicular to the c axis. While for the a axis no magnetic phase transition is observed up to 58 T, for the field applied at 1.8 K along the tetragonal axis we observe above 22.5 T a field-polarized state. A magnetic phase diagram for the field applied along the c axis is presented.

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