Antiferromagnetism and crystalline electric field excitations in tetragonal NaCeO2

Mitchell M. Bordelon, Joshua D. Bocarsly, Lorenzo Posthuma, Arnab Banerjee, Qiang Zhang, and Stephen D. Wilson
Phys. Rev. B 103, 024430 – Published 19 January 2021

Abstract

We investigate the crystal structure, magnetic properties, and crystalline electric field of tetragonal, I41/amd, NaCeO2. In this compound, Ce3+ ions form a tetragonally elongated diamond lattice coupled by antiferromagnetic interactions (ΘCW=7.69 K) that magnetically order below TN=3.18 K. The Ce3+J=5/2 crystalline electric field-split multiplet is studied via inelastic neutron scattering to parametrize a Jeff=1/2 ground state doublet composed of states possessing mixed |mz character. Neutron powder diffraction data reveal the onset of A-type antiferromagnetism with μ=0.57(2)μB moments aligned along the c axis. The magnetic structure is consistent with the expectations of a frustrated Heisenberg J1J2 model on the elongated diamond lattice with effective exchange values J1>4J2 and J1>0.

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  • Received 26 October 2020
  • Accepted 4 January 2021

DOI:https://doi.org/10.1103/PhysRevB.103.024430

©2021 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Mitchell M. Bordelon1, Joshua D. Bocarsly2, Lorenzo Posthuma1, Arnab Banerjee3, Qiang Zhang3, and Stephen D. Wilson1,*

  • 1Materials Department, University of California, Santa Barbara, California 93106, USA
  • 2Materials Research Laboratory, University of California, Santa Barbara, California 93106, USA
  • 3Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA

  • *stephendwilson@ucsb.edu

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Issue

Vol. 103, Iss. 2 — 1 January 2021

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