Room temperature ferromagnetism in ZnO prepared by microemulsion
Clear room temperature ferromagnetism has been observed in ZnO powders prepared by microemulsion. The O vacancy (VO) clusters mediated by the VO with one electron (F center) contributed to the ferromagnetism, while the isolated F centers contributed to the low temperature paramagnetism. Annealing in...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
AIP Publishing LLC
2011-09-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/1.3624926 |
| _version_ | 1811314900470857728 |
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| author | Qingyu Xu Zheng Wen Hua Zhang Xiaosi Qi Wei Zhong Liguo Xu Di Wu Kai Shen Mingxiang Xu |
| author_facet | Qingyu Xu Zheng Wen Hua Zhang Xiaosi Qi Wei Zhong Liguo Xu Di Wu Kai Shen Mingxiang Xu |
| author_sort | Qingyu Xu |
| collection | DOAJ |
| description | Clear room temperature ferromagnetism has been observed in ZnO powders prepared by microemulsion. The O vacancy (VO) clusters mediated by the VO with one electron (F center) contributed to the ferromagnetism, while the isolated F centers contributed to the low temperature paramagnetism. Annealing in H2 incorporated interstitial H (Hi) in ZnO, and removed the isolated F centers, leading to the suppression of the paramagnetism. The ferromagnetism has been considered to originate from the VO clusters mediated by the Hi, leading to the enhancement of the coercivity. The ferromagnetism disappeared after annealing in air due to the reduction of Hi. |
| first_indexed | 2024-04-13T11:20:40Z |
| format | Article |
| id | doaj.art-1ba81a062e6b4de4bbce8420d598f9eb |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-04-13T11:20:40Z |
| publishDate | 2011-09-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-1ba81a062e6b4de4bbce8420d598f9eb2022-12-22T02:48:50ZengAIP Publishing LLCAIP Advances2158-32262011-09-0113032127032127-510.1063/1.3624926027103ADVRoom temperature ferromagnetism in ZnO prepared by microemulsionQingyu Xu0Zheng Wen1Hua Zhang2Xiaosi Qi3Wei Zhong4Liguo Xu5Di Wu6Kai Shen7Mingxiang Xu8Department of Physics, Southeast University, Nanjing 211189, ChinaDepartment of Materials Science and Engineering, Nanjing University, Nanjing 210008, ChinaDepartment of Physics, Southeast University, Nanjing 211189, ChinaDepartment of Physics, Nanjing University, Nanjing 210008, ChinaDepartment of Physics, Nanjing University, Nanjing 210008, ChinaSchool of Materials Science and Technology, Nanjing University of aeronautics and Astronautics, Nanjing 210016, ChinaDepartment of Materials Science and Engineering, Nanjing University, Nanjing 210008, ChinaSchool of Materials Science and Technology, Nanjing University of aeronautics and Astronautics, Nanjing 210016, ChinaDepartment of Physics, Southeast University, Nanjing 211189, ChinaClear room temperature ferromagnetism has been observed in ZnO powders prepared by microemulsion. The O vacancy (VO) clusters mediated by the VO with one electron (F center) contributed to the ferromagnetism, while the isolated F centers contributed to the low temperature paramagnetism. Annealing in H2 incorporated interstitial H (Hi) in ZnO, and removed the isolated F centers, leading to the suppression of the paramagnetism. The ferromagnetism has been considered to originate from the VO clusters mediated by the Hi, leading to the enhancement of the coercivity. The ferromagnetism disappeared after annealing in air due to the reduction of Hi.http://dx.doi.org/10.1063/1.3624926 |
| spellingShingle | Qingyu Xu Zheng Wen Hua Zhang Xiaosi Qi Wei Zhong Liguo Xu Di Wu Kai Shen Mingxiang Xu Room temperature ferromagnetism in ZnO prepared by microemulsion AIP Advances |
| title | Room temperature ferromagnetism in ZnO prepared by microemulsion |
| title_full | Room temperature ferromagnetism in ZnO prepared by microemulsion |
| title_fullStr | Room temperature ferromagnetism in ZnO prepared by microemulsion |
| title_full_unstemmed | Room temperature ferromagnetism in ZnO prepared by microemulsion |
| title_short | Room temperature ferromagnetism in ZnO prepared by microemulsion |
| title_sort | room temperature ferromagnetism in zno prepared by microemulsion |
| url | http://dx.doi.org/10.1063/1.3624926 |
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