Inelastic neutron scattering investigation of the crystal field excitations of NdCo5
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 5K reveal two levels at approximately 28.9 and 52.9 meV. Crystal-field calculations including the exchange field Bexc from the...
| Main Authors: | , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
American Physical Society
2023
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| _version_ | 1797112806709919744 |
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| author | Passos, FDA Nilsen, GJ Patrick, CE Le, MD Balakrishnan, G Kumar, S Thamizhavel, A Cornejo, DR Jiménez, JL |
| author_facet | Passos, FDA Nilsen, GJ Patrick, CE Le, MD Balakrishnan, G Kumar, S Thamizhavel, A Cornejo, DR Jiménez, JL |
| author_sort | Passos, FDA |
| collection | OXFORD |
| description | 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 5K 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 A66(r6) 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. |
| first_indexed | 2024-03-07T08:21:33Z |
| format | Journal article |
| id | oxford-uuid:5cf4b14f-ff94-4019-baf8-c1ce04311455 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-04-09T03:54:41Z |
| publishDate | 2023 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | oxford-uuid:5cf4b14f-ff94-4019-baf8-c1ce043114552024-03-07T15:53:17ZInelastic neutron scattering investigation of the crystal field excitations of NdCo5Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:5cf4b14f-ff94-4019-baf8-c1ce04311455EnglishSymplectic ElementsAmerican Physical Society2023Passos, FDANilsen, GJPatrick, CELe, MDBalakrishnan, GKumar, SThamizhavel, ACornejo, DRJiménez, JLWe 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 5K 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 A66(r6) 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. |
| spellingShingle | Passos, FDA Nilsen, GJ Patrick, CE Le, MD Balakrishnan, G Kumar, S Thamizhavel, A Cornejo, DR Jiménez, JL Inelastic neutron scattering investigation of the crystal field excitations of NdCo5 |
| title | Inelastic neutron scattering investigation of the crystal field excitations of NdCo5 |
| title_full | Inelastic neutron scattering investigation of the crystal field excitations of NdCo5 |
| title_fullStr | Inelastic neutron scattering investigation of the crystal field excitations of NdCo5 |
| title_full_unstemmed | Inelastic neutron scattering investigation of the crystal field excitations of NdCo5 |
| title_short | Inelastic neutron scattering investigation of the crystal field excitations of NdCo5 |
| title_sort | inelastic neutron scattering investigation of the crystal field excitations of ndco5 |
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