Emergent ferromagnetism in ZnO/Al2O3 core-shell nanowires : towards oxide spinterfaces
We report that room-temperature ferromagnetism emerges at the interface formed between ZnO nanowire core and Al2O3 shell although both constituents show mainly diamagnetism. The interface-based ferromagnetism can be further enhanced by annealing the ZnO/Al2O3 core-shell nanowires and activating the...
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
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2014
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| Online Access: | https://hdl.handle.net/10356/100094 http://hdl.handle.net/10220/18441 |
| _version_ | 1811690308337926144 |
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| author | Xing, G. Z. Wang, D. D. Cheng, C.-J. He, M. Li, S. Wu, T. |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Xing, G. Z. Wang, D. D. Cheng, C.-J. He, M. Li, S. Wu, T. |
| author_sort | Xing, G. Z. |
| collection | NTU |
| description | We report that room-temperature ferromagnetism emerges at the interface formed between ZnO nanowire core and Al2O3 shell although both constituents show mainly diamagnetism. The interface-based ferromagnetism can be further enhanced by annealing the ZnO/Al2O3 core-shell nanowires and activating the formation of ZnAl2O4 phase as a result of interfacial solid-state reaction. High-temperature measurements indicate that the magnetic order is thermally stable up to 750 K. Transmission electron microscopy studies reveal the annealing-induced jagged interfaces, and the extensive structural defects appear to be relevant to the emergent magnetism. Our study suggests that tailoring the spinterfaces in nanostructure-harnessed wide-band-gap oxides is an effective route towards engineered nanoscale architecture with enhanced magnetic properties. |
| first_indexed | 2024-10-01T06:01:56Z |
| format | Journal Article |
| id | ntu-10356/100094 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:01:56Z |
| publishDate | 2014 |
| record_format | dspace |
| spelling | ntu-10356/1000942023-02-28T19:32:59Z Emergent ferromagnetism in ZnO/Al2O3 core-shell nanowires : towards oxide spinterfaces Xing, G. Z. Wang, D. D. Cheng, C.-J. He, M. Li, S. Wu, T. School of Physical and Mathematical Sciences DRNTU::Science::Physics We report that room-temperature ferromagnetism emerges at the interface formed between ZnO nanowire core and Al2O3 shell although both constituents show mainly diamagnetism. The interface-based ferromagnetism can be further enhanced by annealing the ZnO/Al2O3 core-shell nanowires and activating the formation of ZnAl2O4 phase as a result of interfacial solid-state reaction. High-temperature measurements indicate that the magnetic order is thermally stable up to 750 K. Transmission electron microscopy studies reveal the annealing-induced jagged interfaces, and the extensive structural defects appear to be relevant to the emergent magnetism. Our study suggests that tailoring the spinterfaces in nanostructure-harnessed wide-band-gap oxides is an effective route towards engineered nanoscale architecture with enhanced magnetic properties. Published version 2014-01-10T04:23:30Z 2019-12-06T20:16:36Z 2014-01-10T04:23:30Z 2019-12-06T20:16:36Z 2013 2013 Journal Article Xing, G. Z., Wang, D. D., Cheng, C.-J., He, M., Li, S., & Wu, T. (2013). Emergent ferromagnetism in ZnO/Al2O3 core-shell nanowires : towards oxide spinterfaces. Applied physics letters, 103(2), 022402-. 0003-6951 https://hdl.handle.net/10356/100094 http://hdl.handle.net/10220/18441 10.1063/1.4813217 en Applied physics letters © 2013 AIP Publishing LLC. This paper was published in Applied Physics Letters and is made available as an electronic reprint (preprint) with permission of AIP Publishing LLC. The paper can be found at the following official DOI: [http://dx.doi.org/10.1063/1.4813217]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. application/pdf |
| spellingShingle | DRNTU::Science::Physics Xing, G. Z. Wang, D. D. Cheng, C.-J. He, M. Li, S. Wu, T. Emergent ferromagnetism in ZnO/Al2O3 core-shell nanowires : towards oxide spinterfaces |
| title | Emergent ferromagnetism in ZnO/Al2O3 core-shell nanowires : towards oxide spinterfaces |
| title_full | Emergent ferromagnetism in ZnO/Al2O3 core-shell nanowires : towards oxide spinterfaces |
| title_fullStr | Emergent ferromagnetism in ZnO/Al2O3 core-shell nanowires : towards oxide spinterfaces |
| title_full_unstemmed | Emergent ferromagnetism in ZnO/Al2O3 core-shell nanowires : towards oxide spinterfaces |
| title_short | Emergent ferromagnetism in ZnO/Al2O3 core-shell nanowires : towards oxide spinterfaces |
| title_sort | emergent ferromagnetism in zno al2o3 core shell nanowires towards oxide spinterfaces |
| topic | DRNTU::Science::Physics |
| url | https://hdl.handle.net/10356/100094 http://hdl.handle.net/10220/18441 |
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