Abstract

Structural, morphological, optical and magnetic properties of chemically synthesized Indium-doped BaSnO₃ (BSO) nanostructures were investigated. XRD results indicated cubic structure from Rietveld refinements and FT-IR studies confirmed the characteristic vibrations for all doped compounds. The presence of oxygen vacancies were derived from the defect-induced Raman modes. Surface morphological studies by HR-SEM showed a significant change from pseudo-cuboids to mixed rods. The presence of oxygen vacancies, oxidation states and elements (Ba, Sn, O and In) were studied by X-ray Photoelectron spectroscopy. UV–Vis and Photoluminescence studies demonstrated a decreasing tendency in bandgap values and the presence of defect states. Interesting defect sites and F-centres were probed by Electron paramagnetic resonance studies. A transition from diamagnetic to ferromagnetic behaviour observed from room temperature magnetic measurements was explained based on F-centre exchange interaction.

中文翻译：

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铟掺杂锡酸钡体系中的感应铁磁性和增强的光学行为

摘要

研究了化学合成的掺铟BaSnO ₃（BSO）纳米结构的结构，形态，光学和磁性。XRD结果表明Rietveld精炼的立方结构，FT-IR研究证实了所有掺杂化合物的特征振动。氧空位的存在源自缺陷诱导的拉曼模式。通过HR-SEM进行的表面形态研究表明，从伪立方到混合棒有显着变化。用X射线光电子能谱研究了氧空位，氧化态和元素（Ba，Sn，O和In）的存在。UV-Vis和光致发光研究表明，带隙值和缺陷状态的存在呈下降趋势。有趣的缺陷部位和F电子顺磁共振研究探查了中心。根据F中心交换相互作用，解释了从室温磁测量所观察到的从反磁行为到铁磁行为的转变。