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首页> 外文期刊>Materials Science and Engineering >Tailoring the structural, optical and magnetic properties of BiFeO_3 multiferroic nanoparticles by Ba, Cr co-doping
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Tailoring the structural, optical and magnetic properties of BiFeO_3 multiferroic nanoparticles by Ba, Cr co-doping

机译：Ba，Cr共掺杂调节BiFeO_3多铁纳米颗粒的结构，光学和磁性

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摘要

Phase pure BiFeO3 (BFO) and Bi0.98Ba0.02Fe1-xCrxO3 (x = 0.01, 0.02, 0.03, 0.04) nanoparticles were synthesized by a facile sol-gel route. X-ray diffraction data confirms rhombohedral R3c phase of BFO and Ba, Cr co-doped BFO nanoparticles with a slight distortion at higher dopant concentration. TEM images verified the higher crystallinity of the samples with a significant reduction in particle size (similar to 40 nm) with increasing Cr concentration. The band gap of pristine BFO nanoparticles was found to be 1.8 eV which increases remarkably to a maximum of 2.32 eV for Ba, Cr co-doped BFO nanoparticles. Fe-57 Mossbauer spectroscopy confirmed that no mixed valance state of Fe was present in the Ba, Cr co-doped BFO nanoparticles. Hysteresis loops of all the samples revealed the weak ferromagnetic nature of the co-doped BFO nanoparticles. It was observed that the saturation magnetization increased by more than 3 times when Cr content was increased from 1% to 4%.
机译：通过简便的溶胶-凝胶法合成了相纯BiFeO3（BFO）和Bi0.98Ba0.02Fe1-xCrxO3（x = 0.01、0.02、0.03、0.04）纳米粒子。 X射线衍射数据证实了BFO和Ba，Cr共掺杂的BFO纳米颗粒的菱形R3c相在较高的掺杂剂浓度下略有变形。 TEM图像验证了样品的较高结晶度，随着Cr浓度的增加，颗粒尺寸（约40 nm）显着减小。发现原始的BFO纳米粒子的带隙为1.8eV，对于Ba，Cr共掺杂的BFO纳米粒子，其显着增加至最大2.32eV。 Fe-57 Mossbauer光谱证实在Ba，Cr共掺杂的BFO纳米粒子中不存在Fe的混合价态。所有样品的磁滞回线显示了共掺杂BFO纳米粒子的弱铁磁特性。观察到，当Cr含量从1％增加到4％时，饱和磁化强度增加了3倍以上。

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  • 来源
    《Materials Science and Engineering》 |2019年第2期|48-54|共7页
  • 作者

    Puhan A.; Bhushan B.; Kumar V.; Panda H. S.; Priyam A.; Das D.; Rout D.;

  • 作者单位

    KIIT Univ, Sch Appl Sci, Dept Phys, Bhubaneswar 751024, India;

    KIIT Univ, Sch Appl Sci, Dept Phys, Bhubaneswar 751024, India;

    Def Inst Adv Technol, Dept Mat Sci & Engn, Pune 411025, Maharashtra, India;

    Def Inst Adv Technol, Dept Mat Sci & Engn, Pune 411025, Maharashtra, India;

    Cent Univ South Bihar, Dept Chem, Gaya 824236, India;

    UGC DAE Consortium Sci Res, Kolkata Ctr LB 3 8, Kolkata 700098, India;

    KIIT Univ, Sch Appl Sci, Dept Phys, Bhubaneswar 751024, India;

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  • 正文语种 eng
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  • 关键词

    Multiferroic; Magnetic properties; Optical properties; co-doping;

    机译：多铁性;磁性;光学性质;共掺杂;

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