Room-temperature ferromagnetism properties of monoclinic VO{sub 2} (M1) nanobelts
- Department of Applied Physics, Chongqing University, Chongqing, 400044 (China)
- Key Lab Optoelect Funt Mat Chongqing, Chongqing, 400047 (China)
Highlights: • The unusual room temperature ferromagnetism of the VO{sub 2}(M1) nanobelts is found in magnetic measurement. • The oxygen vacancies induce the change of Bader charge of V atom from +2.34 to +1.84 (V{sup +4} to V{sup +3}). • The ferromagnetic nature is a result of the oxygen vacancies based on the calculations by DFT. - Abstract: The magnetic properties of monoclinic VO{sub 2}(M1) nanobelts synthesized by the hydrothermal method are investigated. The VO{sub 2}(M1) nanobelts exhibit ferromagnetism at room temperature, which disagrees with previous literatures. The excessive oxygen vacancies induce the ferromagnetic nature of VO{sub 2}(B) nanobelts, which is attributed to the fact that the Bader charge of V atom changes from +2.34 to +1.84 (V{sup +4} to V{sup +3}) based on the calculations by using density functional theory (DFT). The calculations indicate that oxygen vacancy may induce the presence of V{sup 3+} atom, in agreement with experimental observations. The observed ferromagnetism should be a result of oxygen vacancies in VO{sub 2}(M1) nanobelts.
- OSTI ID:
- 22348636
- Journal Information:
- Materials Research Bulletin, Vol. 53; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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