Quantum size effects of small, size-selected and deposited CoRh clusters on Ni
The electronic, chemical and magnetic properties of in situ prepared, mass-selected and deposited Co _x Rh _y alloy clusters with up to five atoms per cluster have been studied by means of x-ray absorption and x-ray magnetic circular dichroism spectroscopy. The clusters were supported on a remanentl...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2016-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/18/11/113007 |
| _version_ | 1827873615769501696 |
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| author | T Beeck I Baev K Chen S Palutke W Wurth M Martins |
| author_facet | T Beeck I Baev K Chen S Palutke W Wurth M Martins |
| author_sort | T Beeck |
| collection | DOAJ |
| description | The electronic, chemical and magnetic properties of in situ prepared, mass-selected and deposited Co _x Rh _y alloy clusters with up to five atoms per cluster have been studied by means of x-ray absorption and x-ray magnetic circular dichroism spectroscopy. The clusters were supported on a remanently magnetized Ni film. The cluster properties exhibit strong size and composition dependent effects. By alloying of pure Co _1,2 adatoms and dimers with Rh the chemical reactivity towards oxygen is significantly enhanced for specific compositions. The oxidation of the alloyed clusters strongly affects the magnetic properties which results in a reduction of the orbital and spin magnetic moments. The exchange coupling between the oxidized Co atoms and the Ni surface exhibits a size and a composition dependent oscillation between antiferromagnetic and ferromagnetic coupling. |
| first_indexed | 2024-03-12T16:40:37Z |
| format | Article |
| id | doaj.art-8e715f7d1ba440dd9aaa96eae44f304d |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:40:37Z |
| publishDate | 2016-01-01 |
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| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-8e715f7d1ba440dd9aaa96eae44f304d2023-08-08T14:33:42ZengIOP PublishingNew Journal of Physics1367-26302016-01-01181111300710.1088/1367-2630/18/11/113007Quantum size effects of small, size-selected and deposited CoRh clusters on NiT Beeck0I Baev1K Chen2S Palutke3W Wurth4M Martins5Physics Department, University of Hamburg , Luruper Chaussee 149, D-22761 Hamburg, GermanyPhysics Department, University of Hamburg , Luruper Chaussee 149, D-22761 Hamburg, GermanyInstitute of Physics II, University of Cologne , Zülpicher Straße 77, D-50937 Cologne, GermanyPhysics Department, University of Hamburg , Luruper Chaussee 149, D-22761 Hamburg, GermanyPhysics Department and Center for Free-Electron Laser Science, University of Hamburg , Luruper Chaussee 149, D-22761 Hamburg, Germany; DESY Photon Science, Notkestraße 85, D-22607 Hamburg, GermanyPhysics Department, University of Hamburg , Luruper Chaussee 149, D-22761 Hamburg, GermanyThe electronic, chemical and magnetic properties of in situ prepared, mass-selected and deposited Co _x Rh _y alloy clusters with up to five atoms per cluster have been studied by means of x-ray absorption and x-ray magnetic circular dichroism spectroscopy. The clusters were supported on a remanently magnetized Ni film. The cluster properties exhibit strong size and composition dependent effects. By alloying of pure Co _1,2 adatoms and dimers with Rh the chemical reactivity towards oxygen is significantly enhanced for specific compositions. The oxidation of the alloyed clusters strongly affects the magnetic properties which results in a reduction of the orbital and spin magnetic moments. The exchange coupling between the oxidized Co atoms and the Ni surface exhibits a size and a composition dependent oscillation between antiferromagnetic and ferromagnetic coupling.https://doi.org/10.1088/1367-2630/18/11/113007XASXMCDdeposited clustersnanoscale magnetismchemical reactivity |
| spellingShingle | T Beeck I Baev K Chen S Palutke W Wurth M Martins Quantum size effects of small, size-selected and deposited CoRh clusters on Ni New Journal of Physics XAS XMCD deposited clusters nanoscale magnetism chemical reactivity |
| title | Quantum size effects of small, size-selected and deposited CoRh clusters on Ni |
| title_full | Quantum size effects of small, size-selected and deposited CoRh clusters on Ni |
| title_fullStr | Quantum size effects of small, size-selected and deposited CoRh clusters on Ni |
| title_full_unstemmed | Quantum size effects of small, size-selected and deposited CoRh clusters on Ni |
| title_short | Quantum size effects of small, size-selected and deposited CoRh clusters on Ni |
| title_sort | quantum size effects of small size selected and deposited corh clusters on ni |
| topic | XAS XMCD deposited clusters nanoscale magnetism chemical reactivity |
| url | https://doi.org/10.1088/1367-2630/18/11/113007 |
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