Epitaxial Ce and the magnetism of single-crystal Ce/Nd superlattices
The chemical structure of epitaxial y cerium and the chemical and magnetic structures of cerium/neodymium superlattices have been studied using x-ray and neutron diffraction techniques. The samples were grown using molecular-beam epitaxy, optimized to yield the desired Ce allotropes. The x-ray measu...
| Auteurs principaux: | , , , , |
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| Format: | Journal article |
| Langue: | English |
| Publié: |
2003
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| _version_ | 1826274548082802688 |
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| author | Clegg, P Goff, J McIntyre, G Ward, R Wells, MR |
| author_facet | Clegg, P Goff, J McIntyre, G Ward, R Wells, MR |
| author_sort | Clegg, P |
| collection | OXFORD |
| description | The chemical structure of epitaxial y cerium and the chemical and magnetic structures of cerium/neodymium superlattices have been studied using x-ray and neutron diffraction techniques. The samples were grown using molecular-beam epitaxy, optimized to yield the desired Ce allotropes. The x-ray measurements show that, in the superlattices, both constituents adopt the dhcp structure and that the stacking sequence remains intact down to T ∼ 2 K; these are the first measurements of magnetic ordering in single-crystal dhcp Ce. The magnetic structure of the superlattices with thicker Nd layers exhibit incommensurate order and ferromagnetism on separate sublattices in a similar manner to Nd under applied pressure. The sample with thickest Ce layers has a magnetic structure similar to bulk β Ce, which has commensurate transverse modulation with a propagation wave vector [1/2 0 0] and moments along the hexagonal a direction. These two types of magnetic order appear to be mutually exclusive. γ Ce is the high-temperature fcc phase of Ce, our single-phase epitaxial sample is observed to go through a new, but partial, structural transition not previously seen in the bulk material. |
| first_indexed | 2024-03-06T22:45:06Z |
| format | Journal article |
| id | oxford-uuid:5ce4efb4-b839-4b4c-9701-c1ff9b0b0a3e |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T22:45:06Z |
| publishDate | 2003 |
| record_format | dspace |
| spelling | oxford-uuid:5ce4efb4-b839-4b4c-9701-c1ff9b0b0a3e2022-03-26T17:31:06ZEpitaxial Ce and the magnetism of single-crystal Ce/Nd superlatticesJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:5ce4efb4-b839-4b4c-9701-c1ff9b0b0a3eEnglishSymplectic Elements at Oxford2003Clegg, PGoff, JMcIntyre, GWard, RWells, MRThe chemical structure of epitaxial y cerium and the chemical and magnetic structures of cerium/neodymium superlattices have been studied using x-ray and neutron diffraction techniques. The samples were grown using molecular-beam epitaxy, optimized to yield the desired Ce allotropes. The x-ray measurements show that, in the superlattices, both constituents adopt the dhcp structure and that the stacking sequence remains intact down to T ∼ 2 K; these are the first measurements of magnetic ordering in single-crystal dhcp Ce. The magnetic structure of the superlattices with thicker Nd layers exhibit incommensurate order and ferromagnetism on separate sublattices in a similar manner to Nd under applied pressure. The sample with thickest Ce layers has a magnetic structure similar to bulk β Ce, which has commensurate transverse modulation with a propagation wave vector [1/2 0 0] and moments along the hexagonal a direction. These two types of magnetic order appear to be mutually exclusive. γ Ce is the high-temperature fcc phase of Ce, our single-phase epitaxial sample is observed to go through a new, but partial, structural transition not previously seen in the bulk material. |
| spellingShingle | Clegg, P Goff, J McIntyre, G Ward, R Wells, MR Epitaxial Ce and the magnetism of single-crystal Ce/Nd superlattices |
| title | Epitaxial Ce and the magnetism of single-crystal Ce/Nd superlattices |
| title_full | Epitaxial Ce and the magnetism of single-crystal Ce/Nd superlattices |
| title_fullStr | Epitaxial Ce and the magnetism of single-crystal Ce/Nd superlattices |
| title_full_unstemmed | Epitaxial Ce and the magnetism of single-crystal Ce/Nd superlattices |
| title_short | Epitaxial Ce and the magnetism of single-crystal Ce/Nd superlattices |
| title_sort | epitaxial ce and the magnetism of single crystal ce nd superlattices |
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