Sc modified multiferroic BiFeO3 thin films prepared through a sol-gel process
Sc modified multiferroic BiFeO3 thin films prepared through a sol-gel process
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DOI：
10.1063/1.2430652
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发表时间：
2007-01
影响因子：
4
通讯作者：
S. Shannigrahi;A. Huang;N. Chandrasekhar;D. Tripathy;A. Adeyeye
中科院分区：
文献类型：
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作者：
S. Shannigrahi;A. Huang;N. Chandrasekhar;D. Tripathy;A. Adeyeye
采用溶胶-凝胶法在铂/钛/−/硅衬底上制备了通式为BiFe1SiO_xScxO_3(x=0.0，0.1，0.3，0.5摩尔%)(BFS)的多铁性薄膜。X射线衍射仪分析表明，当Sc掺杂量达到0.3mol%时，晶胞体积增大。BFS(Sc：0.5mol%)薄膜出现了杂质相。当Sc掺杂量达到0.3mol%时，漏电流、铁电和磁性能也得到了改善。BFS(Sc：0.3mol%)薄膜的室温磁位移场具有最低的平面取向磁化强度，表明BFS(Sc：0.3mol%)薄膜的磁化强度较软。在磁场为8kOe的情况下，BFS(Sc：0.3mol%)薄膜的磁介电效应的室温最大值为3.36%。X射线光电子能谱测量表明，Fe具有2+和3+的混合价态。Fe~(2+)/Fe~(3+)比值略有下降。
Multiferroic thin films with the general formula BiFe1−xScxO3 (x=0.0, 0.1, 0.3, and 0.5mol%) (BFS) were synthesized on Pt∕Ti∕SiO2∕Si substrates through a sol-gel deposition method. From the x-ray diffraction (XRD) analysis, it was observed that the unit cell volume increased upon Sc doping up to 0.3mol%. Impure phase appeared for the BFS (Sc: 0.5mol%) films. Leakage current, ferroelectric, and magnetic properties were also found to improve for Sc doping up to 0.3mol%. Room temperature magnetic coercive field for in-plane orientation of films showed the lowest value for BFS (Sc: 0.3mol%) films, which indicates that BFS (Sc: 0.3mol%) films were more magnetically soft. Room temperature value of the magnetodielectric effect in the presence of magnetic field of 8kOe was found to have maximum of 3.36% for the BFS (Sc: 0.3mol%) films. From the x-ray photoelectron spectroscopy measurements, it was observed that the Fe has mixed valency states of 2+ and 3+. The ratio of Fe2+ and Fe3+ was found to decrease slightly...