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首页> 外文期刊>Materials Science and Engineering >Enhanced magnetization and dielectric properties of Ca doped BiFeO_3∶ Er nanoparticles by sol-gel technique
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Enhanced magnetization and dielectric properties of Ca doped BiFeO_3∶ Er nanoparticles by sol-gel technique

机译：通过溶胶 - 凝胶技术增强Ca掺杂BifeO_3: ER纳米粒子的磁化和介电性能

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摘要

Here in, we synthesized pure BiFeO_3 (BFO) and Bi_(0.8-x)Ca_xEr_(0.2)FeO_3 (x = 0.0, 0.05, 0.1, and 0.15 at.%) nano-particles using sol-gel technique and investigated their optical, magnetic, and electrical properties. X-ray diffraction studies reveals structural transformation in BFO from the rhombohedral structure to orthorhombic, without forming any defect phases, with the doping of Er or Ca/Er into BFO. EDX analysis confirms the presence of doped elements (Er and Ca) along with the Bi, Fe and O elements corresponding to BFO host material. TEM images indicate the significant reduction in particle size with increasing the Ca dopant concentration. Further, the band gap of pure BFO nanoparticles (2.30 eV) decreases notably to a minimum of 1.81 eV for Ca and Er co-doped BFO nanoparticles. All samples exhibited the ferromagnetic behavior, Bi_(0.8-x)Ca_xEr_(0.2)FeO_3 (x = 0.05 at.%) nanoparticles yielded 2.9 times higher saturation magnetization compared to BFO nanoparticles. In addition, the conductivity increases by 11.8 times for Bi_(0.8-x)Ca_xEr_(0.2)FeO_3 (x = 0.05 at.%) nanoparticles compared to BFO nanoparticles.
机译：在此，我们合成纯BifeO_3（BFO）和Bi_（0.8-x）Ca_xer_（0.2）Feo_3（x = 0.05,0.1和0.15at。％）纳米粒子使用溶胶 - 凝胶技术，并研究了它们的光学，磁性和电气性能。 X射线衍射研究揭示了BFO的结构转化从菱形结构到正交，而不形成任何缺陷阶段，掺杂ER或CA / ER进入BFO。 EDX分析证实了掺杂元素（ER和CA）的存在以及对应于BFO主体材料的BI，Fe和O元素。 TEM图像表明粒度显着降低了随着Ca掺杂剂浓度的增加。此外，纯BFO纳米颗粒（2.30eV）的带隙显着降低至Ca和Er共掺杂BFO纳米颗粒的最小1.81eV。与BFO纳米颗粒相比，所有样品都表现出铁磁性行为，Bi_（0.8-x）Ca_xer_（0.2）FeO_3（x = 0.05.％）纳米颗粒产生2.9倍升高的饱和磁化强度。另外，与BFO纳米颗粒相比，对Bi_（0.8-x）Ca_xer_（0.2）FeO_3（x = 0.05at）的纳米颗粒增加了11.8倍的电导率。

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  • 来源
    《Materials Science and Engineering》 |2021年第8期|115235.1-115235.13|共13页
  • 作者

    K. Sunil Kumar; A. Sudharani; M. Ramanadha; S. Ramu; G. Murali; R.P. Vijayalakshmi;

  • 作者单位

    Dept. of Physics Sri Venkateswara University Tirupati 517502 India;

    Dept. of Physics Sri Venkateswara University Tirupati 517502 India;

    Dept. of Physics Sri Venkateswara University Tirupati 517502 India;

    Dept. of Physics Sri Venkateswara University Tirupati 517502 India;

    Department of Polymer Science and Engineering Department of IT Convergence (BK21 PLUS) Chemical Industry Institute Korea National University of Transportation Chungju 27469 South Korea;

    Dept. of Physics Sri Venkateswara University Tirupati 517502 India;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    BFO; Ca doped BFO: Er nanoparticles; Magnetization; Dielectric properties;

    机译：BFO;CA掺杂BFO：ER纳米粒子;磁化;介电性质;

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