Magnetic Properties and Signatures of Ordering in Triangular Lattice Antiferromagnet KCeO2

Published

September 15, 2021

Author(s)

Mitchell M. Bordelon, Xiaoling Wang, Daniel M. Pajerowski, Arnab Banerjee, Mark Sherwin, Craig Brown, M. Eldeeb, T. Petersen, L. Hozoi, U. Robler, Martin Mourigal

Abstract

The magnetic ground state and the crystalline electric field level scheme of the triangular lattice antiferromagnet KCeO₂are investigated. Below T_N = 300 mK, KCeO₂ develops signatures of magnetic order in specific heat measurements and low energy inelastic neutron scattering data. Trivalent Ce³⁺ ions in the D_3d local environment of this compound exhibit large splittings among the lowest three 4f¹ Kramers doublets defining for the free ion the J = 5/2 sextet and a ground state doublet with dipole character, consistent with recent theoretical predictions in M. S. Eldeeb et al. Phys. Rev. Materials 4, 124001 (2020). An unexplained, additional local mode appears, and potential origins of this anomalous mode are discussed.

Citation

Physical Review B

Pub Type

Journals

Keywords

frustrated magnetism, antiferromagnet, neutron powder diffraction

Citation

Bordelon, M. , Wang, X. , Pajerowski, D. , Banerjee, A. , Sherwin, M. , Brown, C. , Eldeeb, M. , Petersen, T. , Hozoi, L. , Robler, U. and Mourigal, M. (2021), Magnetic Properties and Signatures of Ordering in Triangular Lattice Antiferromagnet KCeO₂, Physical Review B (Accessed April 19, 2024)