標題: | Room-temperature ferromagnetism in carbon- and nitrogen-doped rutile TiO2 |
作者: | Wang, Jia-Bin Wu, Kuei-Ching Mi, Jyun-Wei Luo, Chih-Wei Wu, Kaung-Hsiung Uen, Tzeng-Ming Lin, Jiunn-Yuan Juang, Jenh-Yih Liu, Shiu-Jen 電子物理學系 物理研究所 Department of Electrophysics Institute of Physics |
公開日期: | 1-Feb-2015 |
摘要: | Marked room-temperature ferromagnetism (RTFM) was obtained in carbon- and nitrogen-doped rutile powders. X-ray photoelectron spectroscopy measurements revealed the co-existence of considerable densities of states near the Fermi level () and oxygen vacancies primarily induced by C- and N-doping. Density functional theory calculations showed that the local moments responsible for the observed RTFM in N-doped were primarily attributed to the partially populated, spin-polarized Ti band. In addition to the unfilled Ti band, the spin splitting in C states near in C-doped , which may be induced by the interaction between the C impurities and neighboring oxygen ions, results in Stoner band-splitting-type ferromagnetism. |
URI: | http://dx.doi.org/10.1007/s00339-014-8788-2 http://hdl.handle.net/11536/124188 |
ISSN: | 0947-8396 |
DOI: | 10.1007/s00339-014-8788-2 |
期刊: | APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING |
Volume: | 118 |
起始頁: | 725 |
結束頁: | 731 |
Appears in Collections: | Articles |