Defect types and room temperature ferromagnetism in N-doped rutile TiO2 single crystals
The magnetic properties and defect types of virgin and N-doped TiO2 single crystals are probed by superconducting quantum interference device （SQUID）, X-ray photoelectron spectroscopy （XPS）, and positron annihilation analysis （PAS）. Upon N doping, a twofold enhancement of the saturation magnetizatio...
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| Published in | 中国物理B：英文版 no. 6; pp. 519 - 523 |
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| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
01.06.2014
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1674-1056 2058-3834 |
| DOI | 10.1088/1674-1056/23/6/067502 |
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| Abstract | The magnetic properties and defect types of virgin and N-doped TiO2 single crystals are probed by superconducting quantum interference device （SQUID）, X-ray photoelectron spectroscopy （XPS）, and positron annihilation analysis （PAS）. Upon N doping, a twofold enhancement of the saturation magnetization is observed. Apparently, this enhancement is not related to an increase in oxygen vacancy, rather to unpaired 3d electrons in Ti3＋, arising from titanium vacancies and the replacement of O with N atoms in the futile structure. The production of titanium vacancies can enhance the room temperature ferromagnetism （RTFM）, and substitution of O with N is the onset of ferromagnetism by inducing relatively strong ferromagnetic ordering. |
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| AbstractList | The magnetic properties and defect types of virgin and N-doped TiO2 single crystals are probed by superconducting quantum interference device （SQUID）, X-ray photoelectron spectroscopy （XPS）, and positron annihilation analysis （PAS）. Upon N doping, a twofold enhancement of the saturation magnetization is observed. Apparently, this enhancement is not related to an increase in oxygen vacancy, rather to unpaired 3d electrons in Ti3＋, arising from titanium vacancies and the replacement of O with N atoms in the futile structure. The production of titanium vacancies can enhance the room temperature ferromagnetism （RTFM）, and substitution of O with N is the onset of ferromagnetism by inducing relatively strong ferromagnetic ordering. |
| Author | 秦秀波 李东翔 李瑞琴 张鹏 李玉晓 王宝义 |
| AuthorAffiliation | Key Laboratory of Nuclear Analysis Techniques, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China School of Mathematics and Physics, Anshun University, Anshun 561000, China School of Physical Engineering, Zhengzhou University, Zhengzhou 450001, China Division for Nuclear Technology and Application, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China |
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| Notes | Qin Xiu-Bo, Li Dong-Xiang, Li Rui-Qin, Zhang Peng, Li Yu-Xiao, Wang Bao-Yi（ a） Key Laboratory of Nuclear Analysis Techniques, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China b） School of Mathematics and Physics, Anshun University, Anshun 561000, China c） School of Physical Engineering, Zhengzhou University, Zhengzhou 450001, China d）Division for Nuclear Technology and Application, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China N doping, titanium vacancies, replacement of 0 with N atoms, ferromagnetism The magnetic properties and defect types of virgin and N-doped TiO2 single crystals are probed by superconducting quantum interference device （SQUID）, X-ray photoelectron spectroscopy （XPS）, and positron annihilation analysis （PAS）. Upon N doping, a twofold enhancement of the saturation magnetization is observed. Apparently, this enhancement is not related to an increase in oxygen vacancy, rather to unpaired 3d electrons in Ti3＋, arising from titanium vacancies and the replacement of O with N atoms in the futile structure. The production of titanium vacancies can enhance the room temperature ferromagnetism （RTFM）, and substitution of O with N is the onset of ferromagnetism by inducing relatively strong ferromagnetic ordering. 11-5639/O4 |
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| Snippet | The magnetic properties and defect types of virgin and N-doped TiO2 single crystals are probed by superconducting quantum interference device （SQUID）, X-ray... |
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| StartPage | 519 |
| SubjectTerms | N掺杂 X射线光电子能谱 单晶 室温 缺陷类型 超导量子干涉器件 金红石型TiO2 铁磁性 |
| Title | Defect types and room temperature ferromagnetism in N-doped rutile TiO2 single crystals |
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