Abstract
Both enhanced saturation magnetization and coercivity of the flower-shaped hexagonal Ba3V2O8 with a small amount of Ba3VO4.8 in coexistence have been investigated after UV irradiation. The barium vanadate flower is composed of nanosheets with thickness of ∼20nm. The optical absorption edge changes from 3.85eV to 3.67eV after UV irradiation and absorption intensity becomes stronger. The mechanism of magnetic property change is discussed via density functional theory. The result shows that oxygen vacancy produces impurity level within the forbidden energy gap, leading to red shift of optical absorption edge and reduction of V atom from +5 to +4. This study gives a good understanding of the magnetic property induced by the valence state change in Ba3V2O8 nanostructure under the UV irradiation and provides a new route to obtain diluted magnetic semiconductors.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
