Magnetic anisotropy of graphene quantum dots decorated with a ruthenium adatom
The creation of magnetic storage devices by decoration of a graphene sheet by magnetic transition-metal adatoms, utilizing the high in-plane versus out-of-plane magnetic anisotropy energy (MAE), has recently been proposed. This concept is extended in our density-functional-based modeling study by in...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Beilstein-Institut
2013-07-01
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| Series: | Beilstein Journal of Nanotechnology |
| Subjects: | |
| Online Access: | https://doi.org/10.3762/bjnano.4.51 |
| _version_ | 1818591007143362560 |
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| author | Igor Beljakov Velimir Meded Franz Symalla Karin Fink Sam Shallcross Wolfgang Wenzel |
| author_facet | Igor Beljakov Velimir Meded Franz Symalla Karin Fink Sam Shallcross Wolfgang Wenzel |
| author_sort | Igor Beljakov |
| collection | DOAJ |
| description | The creation of magnetic storage devices by decoration of a graphene sheet by magnetic transition-metal adatoms, utilizing the high in-plane versus out-of-plane magnetic anisotropy energy (MAE), has recently been proposed. This concept is extended in our density-functional-based modeling study by incorporating the influence of the graphene edge on the MAE. We consider triangular graphene flakes with both armchair and zigzag edges in which a single ruthenium adatom is placed at symmetrically inequivalent positions. Depending on the edge-type, the graphene edge was found to influence the MAE in opposite ways: for the armchair flake the MAE increases close to the edge, while the opposite is true for the zigzag edge. Additionally, in-plane pinning of the magnetization direction perpendicular to the edge itself is observed for the first time. |
| first_indexed | 2024-12-16T10:05:35Z |
| format | Article |
| id | doaj.art-69911e4b05d84a40af8f671ff8d907e6 |
| institution | Directory Open Access Journal |
| issn | 2190-4286 |
| language | English |
| last_indexed | 2024-12-16T10:05:35Z |
| publishDate | 2013-07-01 |
| publisher | Beilstein-Institut |
| record_format | Article |
| series | Beilstein Journal of Nanotechnology |
| spelling | doaj.art-69911e4b05d84a40af8f671ff8d907e62022-12-21T22:35:40ZengBeilstein-InstitutBeilstein Journal of Nanotechnology2190-42862013-07-014144144510.3762/bjnano.4.512190-4286-4-51Magnetic anisotropy of graphene quantum dots decorated with a ruthenium adatomIgor Beljakov0Velimir Meded1Franz Symalla2Karin Fink3Sam Shallcross4Wolfgang Wenzel5Institute of Nanotechnology (INT), KIT, Karlsruhe, GermanyInstitute of Nanotechnology (INT), KIT, Karlsruhe, GermanyInstitute of Nanotechnology (INT), KIT, Karlsruhe, GermanyInstitute of Nanotechnology (INT), KIT, Karlsruhe, GermanyFriedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Erlangen, GermanyInstitute of Nanotechnology (INT), KIT, Karlsruhe, GermanyThe creation of magnetic storage devices by decoration of a graphene sheet by magnetic transition-metal adatoms, utilizing the high in-plane versus out-of-plane magnetic anisotropy energy (MAE), has recently been proposed. This concept is extended in our density-functional-based modeling study by incorporating the influence of the graphene edge on the MAE. We consider triangular graphene flakes with both armchair and zigzag edges in which a single ruthenium adatom is placed at symmetrically inequivalent positions. Depending on the edge-type, the graphene edge was found to influence the MAE in opposite ways: for the armchair flake the MAE increases close to the edge, while the opposite is true for the zigzag edge. Additionally, in-plane pinning of the magnetization direction perpendicular to the edge itself is observed for the first time.https://doi.org/10.3762/bjnano.4.51adsorbategraphemegraphene quantum dotmagnetic anisotropytransition metal |
| spellingShingle | Igor Beljakov Velimir Meded Franz Symalla Karin Fink Sam Shallcross Wolfgang Wenzel Magnetic anisotropy of graphene quantum dots decorated with a ruthenium adatom Beilstein Journal of Nanotechnology adsorbate grapheme graphene quantum dot magnetic anisotropy transition metal |
| title | Magnetic anisotropy of graphene quantum dots decorated with a ruthenium adatom |
| title_full | Magnetic anisotropy of graphene quantum dots decorated with a ruthenium adatom |
| title_fullStr | Magnetic anisotropy of graphene quantum dots decorated with a ruthenium adatom |
| title_full_unstemmed | Magnetic anisotropy of graphene quantum dots decorated with a ruthenium adatom |
| title_short | Magnetic anisotropy of graphene quantum dots decorated with a ruthenium adatom |
| title_sort | magnetic anisotropy of graphene quantum dots decorated with a ruthenium adatom |
| topic | adsorbate grapheme graphene quantum dot magnetic anisotropy transition metal |
| url | https://doi.org/10.3762/bjnano.4.51 |
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