| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1556056 | Journal of Materials Science & Technology | 2015 | 5 Pages |
Abstract
Herein, we report the magnetic properties of α-MoO3 nanofibers synthesized via a hydrothermal method. X-ray photoelectron and Raman spectroscopic studies have been employed to evidence the presence of oxygen vacancy defects in the α-MoO3 nanofibers. To elucidate the oxygen vacancy related ferromagnetism, post-thermal annealing in oxygen and vacuum was performed. The UV emission band of α-MoO3 nanofibers reveals a red shift from oxygen annealed to vacuum annealed, indicating a band-edge reduction. The saturation magnetization of oxygen annealed nanofibers decreases while that of vacuum annealed nanofibers increases. These results strongly confirm that the oxygen vacancies play a significant role in inducing ferromagnetism. The origin of ferromagnetism may be due to the exchange interactions among localized electron spin moments resulting from oxygen vacancies of α-MoO3 nanofibers. The presence of such defects was further supported by the photoluminescence measurements.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Chemistry
Authors
Sandeep K.S. Patel, Khemchand Dewangan, N.S. Gajbhiye,