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Structural, compositional and magnetic characterization of bulk V_2O_5 doped ZnO system

机译：V_2O_5掺杂ZnO系统的结构，组成和磁性表征

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摘要

This paper investigates the structural, compositional and magnetic properties of vanadium doped ZnO bulk samples prepared by solid state reaction technique. The Rietveld refinement analysis for XRD results of samples showed small change in lattice parameters for 3 and 5% vanadium doped ZnO samples indicating the substitution of Zn~(2+) ions by vanadium ions in ZnO lattice. Raman spectroscopy reveals the change in ZnO modes positions due to vanadium doping. The appearance of E_1 and E_2 modes showed that the wurtzite structure of ZnO is still maintained after doping of vanadium oxide. XPS analysis confirms the presence of the different elements and oxidation states of vanadium ions. M-H curves obtained from VSM showed weak ferromagnetism in the samples. The observation of ferromagnetic behavior indicates the formation of ZnVO phase with V~(2+) ion substitution in the ZnO lattice. XPS scans of the etched bulk samples confirmed the 2+ oxidation state of vanadium ions in our samples explaining the origin of ferromagnetism.
机译：本文研究了固态反应技术制备的钒掺杂ZnO块状样品的结构，组成和磁性。样品的XRD结果的Rietveld细化分析表明，掺杂3％和5％钒的ZnO样品的晶格参数变化很小，表明ZnO晶格中的钒离子替代了Zn〜（2+）离子。拉曼光谱揭示了由于钒掺杂导致的ZnO模式位置的变化。 E_1和E_2模式的出现表明，掺杂氧化钒后ZnO的纤锌矿结构仍然保持。 XPS分析证实了钒离子的不同元素和氧化态的存在。从VSM获得的M-H曲线在样品中显示出弱的铁磁性。铁磁行为的观察表明在ZnO晶格中形成了以V〜（2+）离子取代的ZnVO相。蚀刻后的大块样品的XPS扫描证实了我们样品中钒离子的2+氧化态，这说明了铁磁性的起源。

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  • 来源
    《Applied Surface Science》 |2010年第8期|2309-2314|共6页
  • 作者

    S. Karamat; R.S. Rawat; P. Lee; T.L. Tan; R.V. Ramanujan; W. Zhou;

  • 作者单位

    Natural Sciences and Science Education, National Institute of Education, Nanyang Technological University, 637616, Singapore;

    Natural Science and Science Education, National Institute of Education, Nanyang Technological University, NIE BLK7, 1 Nanyang Walk, Singapore 637616, Singapore;

    Natural Sciences and Science Education, National Institute of Education, Nanyang Technological University, 637616, Singapore;

    Natural Sciences and Science Education, National Institute of Education, Nanyang Technological University, 637616, Singapore;

    School of Material Science and Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 639798, Singapore;

    Precision Engineering and Nanotechnology Centre, School of Mechanical & Aerospace Engineering, Nanyang Technological University, Singapore 639798, Singapore;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    raman spectroscopy; XPS; V doped ZnO;

    机译：拉曼光谱XPS;V掺杂的ZnO;

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