Magnetic properties of UP<sub>2</sub> probed by high-magnetic field

ORAL

Abstract

Due to its complex tetragonal crystal structure, with three distinct uranium sites, UP₂ stands out among other uranium dipnictides such as UAs₂, USb₂, and UBi₂. At ambient pressure, UP2 exhibits antiferromagnetic ordering with TN = 204 K and an effective moment of μeff = 2.29 μB/U. The neutron scattering experiment indicates that the ordered moment is parallel to the [0 0 1] direction and equals 2.0 μB/U. There is, however, a lack of information regarding the magnetic properties of UP2 in high magnetic fields, particularly concerning its magnetic phase diagram. Here we present detailed experimental and theoretical studies of magnetic properties of oriented high-quality single crystals of UP2. The measurements were performed at the High Magnetic Field Laboratory, Los Alamos National Laboratory, using pulsed magnetic fields up to 60 T. We will discuss details of the obtained phase diagram and its relationships to the localization/delocalization of 5f-electrons in this material.

*V.B. acknowledges the support from Idaho National Laboratory's Laboratory Directed Research and Development (LDRD) program under DOE Idaho Operations Office Contract DE-AC07-05ID14517. K.G. acknowledges support from the Division of Materials Science and Engineering, Office of Basic Energy Sciences, Office of Science of the U. S. Department of Energy (U.S. DOE).

–

Presenters

  • Volodymyr Buturlim

    • Idaho National Laboratory
    • Glenn T. Seaborg Institute, Idaho National Laboratory

Authors

  • Volodymyr Buturlim

    • Idaho National Laboratory
    • Glenn T. Seaborg Institute, Idaho National Laboratory

  • Sabin Regmi

    • Idaho National Laboratory

  • Rubi KM

    • High Magnetic Field Laboratory, Los Alamos National Laboratory

  • Dariusz Kaczorowski

    • Polish Academy of Sciences
    • Institute of Low Temperature and Structure Research, Polish Academy of Sciences, 50-422 Wrocław, Poland
    • Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Wroclaw, Poland Poland

  • Neil Harrison

    • Los Alamos National Laboratory (LANL)

  • Krzysztof Gofryk

    • Idaho National Laboratory
    • Center for Quantum Actinide Science and Technology, Idaho National Laboratory