Structural and Ferromagnetic Properties of Ho-Doped BiFeO3 Films
In order to improve the structural and ferromagnetic property of BiFeO3, the effects of Ho3+ doping is systematically investigated.Pure BiFeO3 and Ho-doped BiFeO3 thin films are fabricated by sol-gel method, and the phase structure, morphology, crystalline structure, ferromagnetic are characterized by XRD, SEM, Raman spectra and VSM, respectively.The XRD patterns of the samples indicate that all the compounds crystallize in rhombohedral distorted perovskite structure with space group R3c and the Ho substitution can suppress the intrinsic formation of the miscellaneous phase.The SEM proves that along with the increasing of Ho concentration, the surface roughness of BiFeO3 is decreased due to the reduction of defects in the preparation.From the Raman spectroscopy, it is found that the peak intensity of 8 modes in Bi1-xHoxFeO3 are increased and the modes shift to higher wave number.Besides, the VSM results show that the ferromagnetic of the samples is enhanced with increasing of Ho concentration.When x=0.1, Ms is improved to be 4.8emu/g.The results can prove that the Ho3+ doping can reduce the volatilization of Bi3+, decrease the concentration of oxygen vacancies and improve the room-temperature ferromagnetic of BiFeO3.
BiFeO3 Ho-doped Ferromagnetic Sol-gel method
Ning An Hai-tao Zhang Cheng-zhi Liu Cun-bo Fan Xue Dong Qing-li Song Guan-yu Wen
Changchun Observatory/NAO, Chinese Academy of Sciences, Changchun, 130117, P.R.China
国际会议
The 2016 China Functional Materials Technology and Industry Forum (2016中国国际功能材料大会暨第九届中国功能材料及其应用学术会议)
重庆
英文
996-1000
2016-07-25（万方平台首次上网日期，不代表论文的发表时间）