Magnetic Structure and Crystal Field Potential of PrOs$_4$As$_{12}$

ORAL

Abstract

Neutron powder diffraction and elastic neutron scattering have been used to determine the magnetic structure of the Filled Skutterudite compound PrOs$_4$As$_{12}$. The system becomes antiferromagnetically ordered with a Neel temperature ($T_N$) at 2.28K, which has A-type magnetic structure with spins lying along the doubled axis of the magnetic unit cell. The crystal field potential of PrOs$_4$As$_{12}$ has been studied by inelastic neutron scattering (INS). The ground state in the $T_h$ point group symmetry is determined to be a $\Gamma_5$ triplet. This is confirmed by Zeeman effect exhibited at low temperatures under high magnetic fields.

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Authors

  • Songxue Chi

    The University of Tennessee, Knoxville

  • Pengcheng Dai

    University of Tennessee, The University of Tennessee, Knoxville

  • Hye Jung Kang

    NIST Center for Neutron Research, NIST Center for Neutron Scattering, University of Tennessee, NIST, University of Maryland

  • J.W. Lynn

    NCNR, NIST, NIST Center for Neutron Research, NIST Center for Neutron Scattering

  • F. Ye

    Oak Ridge National Laboratory

  • Z. Henkie

    Institute of Low Temperature and structure research, Poland

  • A. Pietraszko

    Institute of Low Temperature and structure research, Poland

  • Brian Maple

    IPAPS and Physics, UCSD, University of California, San Diego, Department of Physics, University of California, San Diego, University of California San Diego