Magnetic iron oxide nanowires formed by reactive dewetting
The growth and reactive dewetting of ultrathin films of iron oxides supported on Re(0001) surfaces have been imaged in situ in real time. Initial growth forms a nonmagnetic stable FeO (wüstite like) layer in a commensurate network upon which high aspect ratio nanowires of several microns in length b...
| Main Authors: | , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
American Chemical Society
2018
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| _version_ | 1797094107441528832 |
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| author | Bennett, R Etman, H Hicks, H Richards, L Wu, C Castell, M Dhesi, S Maccherozzi, F |
| author_facet | Bennett, R Etman, H Hicks, H Richards, L Wu, C Castell, M Dhesi, S Maccherozzi, F |
| author_sort | Bennett, R |
| collection | OXFORD |
| description | The growth and reactive dewetting of ultrathin films of iron oxides supported on Re(0001) surfaces have been imaged in situ in real time. Initial growth forms a nonmagnetic stable FeO (wüstite like) layer in a commensurate network upon which high aspect ratio nanowires of several microns in length but less than 40 nm in width can be fabricated. The nanowires are closely aligned with the substrate crystallography and imaging by X-ray magnetic circular dichroism shows that each contain a single magnetic domain. The driving force for dewetting appears to be the minimization of strain energy of the Fe3O4 crystallites and follows the Tersoff and Tromp model in which strain is minimized at constant height by extending in one epitaxially matched direction. Such wires are promising in spintronic applications and we predict that the growth will also occur on other hexagonal substrates. |
| first_indexed | 2024-03-07T04:09:32Z |
| format | Journal article |
| id | oxford-uuid:c75af771-362f-4d56-bf8f-75e822623a2c |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T04:09:32Z |
| publishDate | 2018 |
| publisher | American Chemical Society |
| record_format | dspace |
| spelling | oxford-uuid:c75af771-362f-4d56-bf8f-75e822623a2c2022-03-27T06:44:28ZMagnetic iron oxide nanowires formed by reactive dewettingJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:c75af771-362f-4d56-bf8f-75e822623a2cEnglishSymplectic Elements at OxfordAmerican Chemical Society2018Bennett, REtman, HHicks, HRichards, LWu, CCastell, MDhesi, SMaccherozzi, FThe growth and reactive dewetting of ultrathin films of iron oxides supported on Re(0001) surfaces have been imaged in situ in real time. Initial growth forms a nonmagnetic stable FeO (wüstite like) layer in a commensurate network upon which high aspect ratio nanowires of several microns in length but less than 40 nm in width can be fabricated. The nanowires are closely aligned with the substrate crystallography and imaging by X-ray magnetic circular dichroism shows that each contain a single magnetic domain. The driving force for dewetting appears to be the minimization of strain energy of the Fe3O4 crystallites and follows the Tersoff and Tromp model in which strain is minimized at constant height by extending in one epitaxially matched direction. Such wires are promising in spintronic applications and we predict that the growth will also occur on other hexagonal substrates. |
| spellingShingle | Bennett, R Etman, H Hicks, H Richards, L Wu, C Castell, M Dhesi, S Maccherozzi, F Magnetic iron oxide nanowires formed by reactive dewetting |
| title | Magnetic iron oxide nanowires formed by reactive dewetting |
| title_full | Magnetic iron oxide nanowires formed by reactive dewetting |
| title_fullStr | Magnetic iron oxide nanowires formed by reactive dewetting |
| title_full_unstemmed | Magnetic iron oxide nanowires formed by reactive dewetting |
| title_short | Magnetic iron oxide nanowires formed by reactive dewetting |
| title_sort | magnetic iron oxide nanowires formed by reactive dewetting |
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