Highly ordered ultralong magnetic nanowires wrapped in stacked graphene layers
We report on the synthesis and magnetic characterization of ultralong (1 cm) arrays of highly ordered coaxial nanowires with nickel cores and graphene stacking shells (also known as metal-filled carbon nanotubes). Carbon-containing nickel nanowires are first grown on a nanograted surface by magnetro...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Beilstein-Institut
2012-12-01
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| Series: | Beilstein Journal of Nanotechnology |
| Subjects: | |
| Online Access: | https://doi.org/10.3762/bjnano.3.95 |
| _version_ | 1828875911396589568 |
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| author | Abdel-Aziz El Mel Jean-Luc Duvail Eric Gautron Wei Xu Chang-Hwan Choi Benoit Angleraud Agnès Granier Pierre-Yves Tessier |
| author_facet | Abdel-Aziz El Mel Jean-Luc Duvail Eric Gautron Wei Xu Chang-Hwan Choi Benoit Angleraud Agnès Granier Pierre-Yves Tessier |
| author_sort | Abdel-Aziz El Mel |
| collection | DOAJ |
| description | We report on the synthesis and magnetic characterization of ultralong (1 cm) arrays of highly ordered coaxial nanowires with nickel cores and graphene stacking shells (also known as metal-filled carbon nanotubes). Carbon-containing nickel nanowires are first grown on a nanograted surface by magnetron sputtering. Then, a post-annealing treatment favors the metal-catalyzed crystallization of carbon into stacked graphene layers rolled around the nickel cores. The observed uniaxial magnetic anisotropy field oriented along the nanowire axis is an indication that the shape anisotropy dominates the dipolar coupling between the wires. We further show that the thermal treatment induces a decrease in the coercivity of the nanowire arrays. This reflects an enhancement of the quality of the nickel nanowires after annealing attributed to a decrease of the roughness of the nickel surface and to a reduction of the defect density. This new type of graphene–ferromagnetic-metal nanowire appears to be an interesting building block for spintronic applications. |
| first_indexed | 2024-12-13T08:09:11Z |
| format | Article |
| id | doaj.art-9ce286a371c3425ea050a125ecfb5a1b |
| institution | Directory Open Access Journal |
| issn | 2190-4286 |
| language | English |
| last_indexed | 2024-12-13T08:09:11Z |
| publishDate | 2012-12-01 |
| publisher | Beilstein-Institut |
| record_format | Article |
| series | Beilstein Journal of Nanotechnology |
| spelling | doaj.art-9ce286a371c3425ea050a125ecfb5a1b2022-12-21T23:54:15ZengBeilstein-InstitutBeilstein Journal of Nanotechnology2190-42862012-12-013184685110.3762/bjnano.3.952190-4286-3-95Highly ordered ultralong magnetic nanowires wrapped in stacked graphene layersAbdel-Aziz El Mel0Jean-Luc Duvail1Eric Gautron2Wei Xu3Chang-Hwan Choi4Benoit Angleraud5Agnès Granier6Pierre-Yves Tessier7Institut des Matériaux Jean Rouxel, IMN, Université de Nantes, CNRS, 2 rue de la Houssinière, BP 32229, 44322 Nantes cedex 3, France, Telephone: +33 (0) 240 376 434, Fax: +33 (0) 240 373 959Institut des Matériaux Jean Rouxel, IMN, Université de Nantes, CNRS, 2 rue de la Houssinière, BP 32229, 44322 Nantes cedex 3, France, Telephone: +33 (0) 240 376 434, Fax: +33 (0) 240 373 959Institut des Matériaux Jean Rouxel, IMN, Université de Nantes, CNRS, 2 rue de la Houssinière, BP 32229, 44322 Nantes cedex 3, France, Telephone: +33 (0) 240 376 434, Fax: +33 (0) 240 373 959Department of Mechanical Engineering, Stevens Institute of Technology, Hoboken, NJ 07030, USADepartment of Mechanical Engineering, Stevens Institute of Technology, Hoboken, NJ 07030, USAInstitut des Matériaux Jean Rouxel, IMN, Université de Nantes, CNRS, 2 rue de la Houssinière, BP 32229, 44322 Nantes cedex 3, France, Telephone: +33 (0) 240 376 434, Fax: +33 (0) 240 373 959Institut des Matériaux Jean Rouxel, IMN, Université de Nantes, CNRS, 2 rue de la Houssinière, BP 32229, 44322 Nantes cedex 3, France, Telephone: +33 (0) 240 376 434, Fax: +33 (0) 240 373 959Institut des Matériaux Jean Rouxel, IMN, Université de Nantes, CNRS, 2 rue de la Houssinière, BP 32229, 44322 Nantes cedex 3, France, Telephone: +33 (0) 240 376 434, Fax: +33 (0) 240 373 959We report on the synthesis and magnetic characterization of ultralong (1 cm) arrays of highly ordered coaxial nanowires with nickel cores and graphene stacking shells (also known as metal-filled carbon nanotubes). Carbon-containing nickel nanowires are first grown on a nanograted surface by magnetron sputtering. Then, a post-annealing treatment favors the metal-catalyzed crystallization of carbon into stacked graphene layers rolled around the nickel cores. The observed uniaxial magnetic anisotropy field oriented along the nanowire axis is an indication that the shape anisotropy dominates the dipolar coupling between the wires. We further show that the thermal treatment induces a decrease in the coercivity of the nanowire arrays. This reflects an enhancement of the quality of the nickel nanowires after annealing attributed to a decrease of the roughness of the nickel surface and to a reduction of the defect density. This new type of graphene–ferromagnetic-metal nanowire appears to be an interesting building block for spintronic applications.https://doi.org/10.3762/bjnano.3.95carbonferromagneticgraphenenanofabricationnanowiresnickelphase separation |
| spellingShingle | Abdel-Aziz El Mel Jean-Luc Duvail Eric Gautron Wei Xu Chang-Hwan Choi Benoit Angleraud Agnès Granier Pierre-Yves Tessier Highly ordered ultralong magnetic nanowires wrapped in stacked graphene layers Beilstein Journal of Nanotechnology carbon ferromagnetic graphene nanofabrication nanowires nickel phase separation |
| title | Highly ordered ultralong magnetic nanowires wrapped in stacked graphene layers |
| title_full | Highly ordered ultralong magnetic nanowires wrapped in stacked graphene layers |
| title_fullStr | Highly ordered ultralong magnetic nanowires wrapped in stacked graphene layers |
| title_full_unstemmed | Highly ordered ultralong magnetic nanowires wrapped in stacked graphene layers |
| title_short | Highly ordered ultralong magnetic nanowires wrapped in stacked graphene layers |
| title_sort | highly ordered ultralong magnetic nanowires wrapped in stacked graphene layers |
| topic | carbon ferromagnetic graphene nanofabrication nanowires nickel phase separation |
| url | https://doi.org/10.3762/bjnano.3.95 |
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