Low-temperature synthesis and nanomagnetism of large-area α-Fe2O3 nanobelts
Large-area one dimensional (1D) α-Fe2O3 nanostructures were grown on iron substrates by catalyst-free thermal oxidation process at low temperatures in air. The structure characterization revealed that the nanostructures are single crystalline α-Fe2O3. Two kinds of α-Fe2O3 nanostructures, nanobelts a...
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2014
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/100975 http://hdl.handle.net/10220/19028 |
| _version_ | 1811690329319931904 |
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| author | Zhong, Minglong Liu, Zhongwu Yu, Hongya Zhong, Xichun Zeng, Dechang Ramanujan, R. V. |
| author2 | School of Materials Science & Engineering |
| author_facet | School of Materials Science & Engineering Zhong, Minglong Liu, Zhongwu Yu, Hongya Zhong, Xichun Zeng, Dechang Ramanujan, R. V. |
| author_sort | Zhong, Minglong |
| collection | NTU |
| description | Large-area one dimensional (1D) α-Fe2O3 nanostructures were grown on iron substrates by catalyst-free thermal oxidation process at low temperatures in air. The structure characterization revealed that the nanostructures are single crystalline α-Fe2O3. Two kinds of α-Fe2O3 nanostructures, nanobelts and nanoflakes, were obtained due to the different growth temperature range. A surface diffusion mechanism is proposed to account for the nanobelts and nanoflakes growth. The Morin temperature TM of pure 1D α-Fe2O3 nanostructures is 121 K, which is far below their bulk counterparts. The coercive field depends on temperature, and takes values 471 Oe at 5 K and about 260 Oe when the temperature is greater than TM , respectively. |
| first_indexed | 2024-10-01T06:02:16Z |
| format | Journal Article |
| id | ntu-10356/100975 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:02:16Z |
| publishDate | 2014 |
| record_format | dspace |
| spelling | ntu-10356/1009752020-06-01T10:13:52Z Low-temperature synthesis and nanomagnetism of large-area α-Fe2O3 nanobelts Zhong, Minglong Liu, Zhongwu Yu, Hongya Zhong, Xichun Zeng, Dechang Ramanujan, R. V. School of Materials Science & Engineering DRNTU::Engineering::Materials Large-area one dimensional (1D) α-Fe2O3 nanostructures were grown on iron substrates by catalyst-free thermal oxidation process at low temperatures in air. The structure characterization revealed that the nanostructures are single crystalline α-Fe2O3. Two kinds of α-Fe2O3 nanostructures, nanobelts and nanoflakes, were obtained due to the different growth temperature range. A surface diffusion mechanism is proposed to account for the nanobelts and nanoflakes growth. The Morin temperature TM of pure 1D α-Fe2O3 nanostructures is 121 K, which is far below their bulk counterparts. The coercive field depends on temperature, and takes values 471 Oe at 5 K and about 260 Oe when the temperature is greater than TM , respectively. 2014-03-28T07:07:35Z 2019-12-06T20:31:39Z 2014-03-28T07:07:35Z 2019-12-06T20:31:39Z 2013 2013 Journal Article Zhong, M., Liu, Z., Yu, H., Zhong, X., Zeng, D., & Ramanujan, R. V. (2013). Low-temperature synthesis and nanomagnetism of large-area α-Fe2O3 nanobelts. Journal of Nanoscience and Nanotechnology, 13(2), 1525-1529. 1533-4880 https://hdl.handle.net/10356/100975 http://hdl.handle.net/10220/19028 10.1166/jnn.2013.5976 en Journal of nanoscience and nanotechnology © 2013 American Scientific Publishers. |
| spellingShingle | DRNTU::Engineering::Materials Zhong, Minglong Liu, Zhongwu Yu, Hongya Zhong, Xichun Zeng, Dechang Ramanujan, R. V. Low-temperature synthesis and nanomagnetism of large-area α-Fe2O3 nanobelts |
| title | Low-temperature synthesis and nanomagnetism of large-area α-Fe2O3 nanobelts |
| title_full | Low-temperature synthesis and nanomagnetism of large-area α-Fe2O3 nanobelts |
| title_fullStr | Low-temperature synthesis and nanomagnetism of large-area α-Fe2O3 nanobelts |
| title_full_unstemmed | Low-temperature synthesis and nanomagnetism of large-area α-Fe2O3 nanobelts |
| title_short | Low-temperature synthesis and nanomagnetism of large-area α-Fe2O3 nanobelts |
| title_sort | low temperature synthesis and nanomagnetism of large area α fe2o3 nanobelts |
| topic | DRNTU::Engineering::Materials |
| url | https://hdl.handle.net/10356/100975 http://hdl.handle.net/10220/19028 |
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