Abstract Single phasic nanostructured YMnO3 manganites were successfully synthesized by employing acetate precursor based modified sol–gel technique followed by their sintering at different temperatures. Structural studies were carried out by performing X–ray diffraction (XRD) measurement and Rietveld analysis on raw data of XRD. Particle size and shape were studied using transmission electron microscopy (TEM) while size distribution was investigated by performing particle size analyzer. Nanostructured samples were studied for their electrical properties under low applied magnetic field of 1.2T. Frequency and magnetic field dependent dielectric behavior has been understood on the basis of boundaries between the particles and inverse Dzyaloshinskii–Moriya (DM) interaction. Nanostructured YMnO3 manganites exhibit positive magnetodielectric (MD) effect. Universal dielectric response (UDR) model and relaxation mechanism have been employed for dielectric behavior of the samples understudy. Role of particle morphology and magnetic disorder have been discussed for the understanding of impedance and negative magnetoimpedance (MI) of the samples. Frequency and magnetic field dependent variation in conductivity has been explained using boundary and magnetic disorders and free charge carriers in the samples. All nanostructured YMnO3 show positive Magnetoconductivity (MC) throughout the frequency and magnetic field range studied. Variation in voltage dependent hysteretic capacitance and estimated built–in potential have been discussed in the context of the role of defects, vacancies, disorder and free charge carriers in the samples sintered at different temperatures.

中文翻译：

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溶胶-凝胶生长纳米结构 YMnO 3 锰酸盐的低场磁电研究

摘要 采用基于乙酸盐前驱体的改性溶胶-凝胶技术，然后在不同温度下烧结，成功合成了单相纳米结构的 YMnO3 锰酸盐。通过对 XRD 的原始数据进行 X 射线衍射 (XRD) 测量和 Rietveld 分析来进行结构研究。使用透射电子显微镜 (TEM) 研究粒度和形状，而通过执行粒度分析仪研究粒度分布。研究了纳米结构样品在 1.2T 低外加磁场下的电性能。基于粒子之间的边界和逆 Dzyaloshinskii-Moriya (DM) 相互作用，频率和磁场相关的介电行为已被理解。纳米结构的 YMnO3 锰酸盐表现出正磁介电 (MD) 效应。通用介电响应 (UDR) 模型和弛豫机制已用于研究样品的介电行为。为了理解样品的阻抗和负磁阻抗 (MI)，已经讨论了粒子形态和磁性无序的作用。已经使用样品中的边界和磁无序以及自由电荷载流子解释了电导率的频率和磁场依赖性变化。所有纳米结构的 YMnO3 在整个频率和磁场范围内都显示出正磁导率 (MC)。在缺陷、空位、