Magnetic structure and crystalline electric field effects in the triangular antiferromagnet CePtAl4Ge2

Kondo metal CePtAl4Ge2 exhibits long-range antiferromagnetic order below 2.3 K. Neutron powder-diffraction experiments reveal that Ce moments order antiferromagnetically with an incommensurate ordering wave vector k = (1.39, 0, 0.09). Inelastic neutron powder scattering experiments show a magnetic e...

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Bibliographic Details
Published in:Physical review. B 2020-06, Vol.101 (22), p.1
Main Authors: Shin, S, Pomjakushin, V, Keller, L, Rosa, P F S, Stuhr, U, Niedermayer, C, Sibille, R, Toth, S, Kim, J, Jang, H, Son, S-K, Lee, H-O, Shang, T, Medarde, M, Bauer, E D, Kenzelmann, M, Park, T
Format: Article
Language:English
Subjects:
Antiferromagnetism
Cerium
Crystal structure
Crystallinity
Electric fields
Inelastic scattering
Magnetic structure
Neutrons
Temperature dependence
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Summary:Kondo metal CePtAl4Ge2 exhibits long-range antiferromagnetic order below 2.3 K. Neutron powder-diffraction experiments reveal that Ce moments order antiferromagnetically with an incommensurate ordering wave vector k = (1.39, 0, 0.09). Inelastic neutron powder scattering experiments show a magnetic excitation at 14.5 meV, which corresponds to the first excited state due to the crystalline electric field splitting of the ground-state multiplet of Ce3+. The temperature and field dependence of the magnetization of CePtA l 4 G e 2 is consistent with a doublet ground state with a dominant |jz = 1/2⟩ character and a first excited doublet |jz = 3/2⟩ at 14.5 meV.
ISSN:2469-9950
2469-9969
DOI:10.1103/PhysRevB.101.224421