Magnetic properties of V-doped TiO2 nanocrystalline film synthesized by liquid phase deposition technique

作者：Wen, Qi-Ye^*; Gu, De-En; Zhang, Huai-Wu; Yang, Qing-Hui; Li, Yuan-Xun; Liu, Ying-Li; Xiao, J. Q.

来源：Journal of Physics D: Applied Physics , 2009, 42(5): 055012.

DOI：10.1088/0022-3727/42/5/055012

• ROOM-TEMPERATURE
• FERROMAGNETISM
• ZNO
• XPS

V-doped anatase TiO2 films were fabricated by a non-vacuum liquid phase deposition (LPD) technique on glass substrates. All as-prepared films are amorphous, which are highly crystallized to be anatase TiO2 after air or vacuum annealing at 600 degrees C. A nanocrystal structure with a grain size of about 10 nm was confirmed by XRD and high resolution transmission electron microscopy (HRTEM). It is found that in the LPD process, the in situ substitution of Ti by V ions occurred, and V atoms were distributed very uniformly in the TiO2 matrix. The air-annealed V0.025Ti0.975O2 samples are paramagnetic, while the vacuum annealed samples clearly exhibit room-temperature ferromagnetism ( FM) with a magnetic moment of 1.1 mu(B)/V. Our results unambiguously show that oxygen vacancies play a critical role in generating FM in doped TiO2 and an F-centre mechanism for diluted FM is confirmed.

• 出版日期2009-3-7
• 单位电子科技大学