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首页> 外文期刊>Journal of Materials Research >Structural characterization and properties of nanocrystalline Sn_(1-x)Co_xO_2 based dilute magnetic semiconductors
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Structural characterization and properties of nanocrystalline Sn_(1-x)Co_xO_2 based dilute magnetic semiconductors

机译：纳米Sn_（1-x）Co_xO_2基稀磁半导体的结构表征和性能

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摘要

Monophasic Sn_(1-x)Co_xO_2 (x = 0.05, 0.10, and 0.15) nanoparticles with tetragonal structure have been successfully synthesized by solvothermal method using oxalate precursor route. Powder x-ray diffraction and selected area electron diffraction studies confirmed highly crystalline cassiterite SnO_2 structure. The contraction of lattice constants confirmed the incorporation of Co~(2+) in SnO_2 host lattice. Hexagonal nanoparticles with average grain size of 8-13 nm have been formed. With the increasing Co content, the decreasing crystallite size of SnO_2 with increasing surface areas from 194 to 219 m~2/g was found. The percentage reflectance increases on increasing the cobalt concentration, and a noticeable blue shift appeared. The band gap was found to be 3.85, 3.91, and 4.09 eV, respectively. Co-doped SnO_2 showed distinct magnetic behavior with different Co~(2+) concentration. For x = 0.05 and 0.10, nanoparticles showed paramagnetism with antiferromagnetic interaction, however, on further increasing x = 0.15, the nanoparticles showed canted antiferromagnetic coupling.
机译：采用草酸盐前体路线通过溶剂热法成功合成了具有四方结构的单相Sn_（1-x）Co_xO_2（x = 0.05、0.10和0.15）纳米粒子。粉末X射线衍射和选择区域电子衍射研究证实了高度结晶的锡石SnO_2结构。晶格常数的收缩证实了SnO_2主体晶格中Co〜（2+）的结合。已经形成了平均粒径为8-13nm的六边形纳米颗粒。随着Co含量的增加，SnO_2的晶粒尺寸逐渐减小，表面积从194增加到219 m〜2 / g。反射率的百分比随着钴浓度的增加而增加，并且出现明显的蓝移。发现带隙分别为3.85、3.91和4.09eV。共掺杂的SnO_2在不同的Co〜（2+）浓度下表现出明显的磁行为。对于x = 0.05和0.10，纳米粒子显示具有反铁磁相互作用的顺磁性，但是，当x = 0.15进一步增加时，纳米粒子显示倾斜的反铁磁耦合。

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  • 来源
    《Journal of Materials Research》 |2015年第10期|1611-1618|共8页
  • 作者

    Tokeer Ahmad; Sarvari Khatoon;

  • 作者单位

    Nanochemistry Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi 110025, India;

    Nanochemistry Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi 110025, India;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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