Multiple Magnetic Orders in the Three-dimensional Phase Diagram of CeAuSb2 under Magnetic Field and Pressure

ORAL

Abstract

CeAuSb2 is a heavy-fermion antiferromagnet in which the antiferromagnetic transition temperature TN is suppressed by a modest c-axis magnetic field. With pressure, however, new magnetic phases emerge hindering the appearance of a pressure-induced quantum critical point. At ambient pressure, two metamagnetic transitions are observed at Hc1 ~ 2.8 T and Hc2 ~ 5.6 T. A recent neutron scattering study shows that the transition of magnetic structure occurs at Hc1 from a striped to a woven spin density wave. We report the magnetic field-pressure-temperature phase diagram of CeAuSb2 derived from the temperature and field dependence of electrical resistivity under pressure. Above 2.24 GPa, TN splits into two transitions which are connected to the metamagnetic transitions in the temperature-field phase diagram. We will discuss these multiple magnetic orders and critical points in the three-dimensional phase diagram.

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Presenters

  • Soonbeom Seo

    Condensed Matter and Magnetic Science Group, Los Alamos National Laboratory, Condensed Matter and Magnet Science Group, Los Alamos National Laboratory

Authors

  • Soonbeom Seo

    Condensed Matter and Magnetic Science Group, Los Alamos National Laboratory, Condensed Matter and Magnet Science Group, Los Alamos National Laboratory

  • Sean Thomas

    Condensed Matter and Magnetic Science Group, Los Alamos National Laboratory, Los Alamos National Laboratory, Condensed Matter and Magnet Science Group, Los Alamos National Laboratory

  • Filip Ronning

    MPA-CMMS, Los Alamos National Laboratory, Los Alamos Natl Lab, Los Alamos National Laboratory, Condensed Matter and Magnetic Science Group, Los Alamos National Laboratory, Condensed Matter and Magnet Science Group, Los Alamos National Laboratory

  • Eric Bauer

    MPA-CMMS, Los Alamos National Laboratory, Los Alamos National Laboratory, Los Alamos Natl Lab, Condensed Matter and Magnetic Science Group, Los Alamos National Laboratory, Los Alamos National Lab, Condensed Matter and Magnet Science Group, Los Alamos National Laboratory

  • Joe Thompson

    MPA-CMMS, Los Alamos National Laboratory, Los Alamos National Laboratory, Condensed Matter and Magnetic Science Group, Los Alamos National Laboratory, Los Alamos Natl Lab, Condensed Matter and Magnet Science Group, Los Alamos National Laboratory

  • Priscila Rosa

    Los Alamos National Laboratory, Condensed Matter and Magnetic Science Group, Los Alamos National Laboratory, Condensed Matter and Magnet Science Group, Los Alamos National Laboratory