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Antiferromagnetism and crystalline electric field excitations in tetragonal NaCeO2

Journal Article · · Physical Review B
In this work, 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 .
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Univ. of California, Santa Barbara, CA (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
Grant/Contract Number:
AC05-00OR22725; SC0017752
OSTI ID:
1766383
Alternate ID(s):
OSTI ID: 1782244
Journal Information:
Physical Review B, Journal Name: Physical Review B Journal Issue: 2 Vol. 103; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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