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Inelastic neutron scattering investigation of the crystal field excitations of NdCo5
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Passos, F. de Almeida, Nilsen, G. J., Patrick, C. E., Le, M. D., Balakrishnan, Geetha, Kumar, Santosh, Thamizhavel, A., Cornejo, D. R. and Jiménez, J. Larrea (2023) Inelastic neutron scattering investigation of the crystal field excitations of NdCo5. Physical Review B, 108 (17). 174409. doi:10.1103/PhysRevB.108.174409 ISSN 2469-9950.
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Official URL: http://doi.org/10.1103/PhysRevB.108.174409
Abstract
We present an inelastic neutron scattering study of the crystal electric field (CEF) levels in the intermetallic ferrimagnets RECo5 (RE = Nd and Y). In NdCo5, measurements at 5 K reveal two levels at approximately 28.9 and 52.9 meV. Crystal-field calculations including the exchange field Bexc from the Co sites account for both of these, as well as the spectrum at temperatures above the spin-reorientation transition at ∼280 K. In particular, it is found that both a large hexagonal crystal field parameter A^6_6 <r^6> and Bexc are required to reproduce the data, with the latter having a much larger value than that deduced from previous computational and experimental studies. Our study sheds light on the delicate interplay of terms in the rare-earth Hamiltonian of RECo5 systems, and is therefore expected to stimulate further experimental and computational work on the broader family of rare-earth permanent magnets.
Item Type: | Journal Article | ||||||||||
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Subjects: | Q Science > QC Physics Q Science > QD Chemistry T Technology > TA Engineering (General). Civil engineering (General) |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||||
Library of Congress Subject Headings (LCSH): | Neutrons -- Scattering, Magnetic resonance, Magnetochemistry, Crystals -- Magnetic properties, Ferrimagnetism, Intermetallic compounds -- Magnetic properties, Rare earth crystals, Rare earth metals | ||||||||||
Journal or Publication Title: | Physical Review B | ||||||||||
Publisher: | American Physical Society | ||||||||||
ISSN: | 2469-9950 | ||||||||||
Official Date: | 1 November 2023 | ||||||||||
Dates: |
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Volume: | 108 | ||||||||||
Number: | 17 | ||||||||||
Article Number: | 174409 | ||||||||||
DOI: | 10.1103/PhysRevB.108.174409 | ||||||||||
Status: | Peer Reviewed | ||||||||||
Publication Status: | Published | ||||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||||
Copyright Holders: | © 2023 American Physical Society | ||||||||||
Date of first compliant deposit: | 10 November 2023 | ||||||||||
Date of first compliant Open Access: | 13 November 2023 | ||||||||||
RIOXX Funder/Project Grant: |
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