Antiferromagnetism and crystalline electric field excitations in tetragonal NaCeO2

Mitchell M. Bordelon; Joshua D. Bocarsly; Lorenzo Posthuma; Arnab Banerjee; Qiang Zhang; Stephen D. Wilson

doi:10.1103/PhysRevB.103.024430

Antiferromagnetism and crystalline electric field excitations in tetragonal NaCeO2

Mitchell M. Bordelon, Joshua D. Bocarsly, Lorenzo Posthuma, Arnab Banerjee, Qiang Zhang, Stephen D. Wilson

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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 J1-J2 model on the elongated diamond lattice with effective exchange values J1>4J2 and J1>0.

Original language	English
Article number	024430
Journal	Physical Review B
Volume	103
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevB.103.024430
State	Published - Jan 19 2021

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© 2021 American Physical Society.

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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 J1-J2 model on the elongated diamond lattice with effective exchange values J1>4J2 and J1>0.",

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AU - Bordelon, Mitchell M.

AU - Bocarsly, Joshua D.

AU - Posthuma, Lorenzo

AU - Banerjee, Arnab

AU - Zhang, Qiang

AU - Wilson, Stephen D.

PY - 2021/1/19

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N2 - 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 J1-J2 model on the elongated diamond lattice with effective exchange values J1>4J2 and J1>0.

AB - 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 J1-J2 model on the elongated diamond lattice with effective exchange values J1>4J2 and J1>0.

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Antiferromagnetism and crystalline electric field excitations in tetragonal NaCeO2

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