Frustrated antiferromagnetic(AFM) order in CeCd3As3

ORAL

Abstract

The relatively unexplored compound CeCd3As3 crystallizes in the P63/mmc space group, and has geometrically frustrated triangular arrangements of magnetic cerium atoms in the a/b plane. Magnetization measurements indicate strong out of plane AFM interactions. Our heat capacity, C(T), measurements on a single crystal reveal a sharp peak at TN = 420 mK in zero field, consistent with an out of plane AFM phase transition. Applying a magnetic field within the easy-plane raises TN to 490 mK at 2 T demonstrating lifting of frustration. At high fields TN is suppressed to zero, and C(T) no longer resembles that of an AFM. Instead we observed an excess of entropy at the lowest temperatures measured. These results indicate competition between AFM order and frustration at low fields, and a field induced highly degenerate ground state at stronger fields.

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Presenters

  • Keenan Avers

    Physics, Northwestern University

Authors

  • Keenan Avers

    Physics, Northwestern University

  • Roman Movshovich

    Los Alamos National Laboratory, Condensed Matter and Magnet Sciences, Los Alamos National Laboratory

  • William Halperin

    Northwestern University, Physics, Northwestern University

  • Joe D Thompson

    Los Alamos National Laboratory, MPA-CMMS, Los Alamos National Laboratory, Los Alamos, USA, MPA-CMMS, Los Alamos National Laboratory, Condensed Matter and Magnet Sciences, Los Alamos National Laboratory

  • Priscila Rosa

    Los Alamos National Laboratory, MPA-CMMS, Los Alamos National Laboratory, Los Alamos, USA, Condensed Matter and Magnet Sciences, Los Alamos National Laboratory