Abstract

In the present communication, nanostructured Bi_0.9Nd_0.1FeO₃ (BNFO) multiferroics have been successfully synthesized by sol–gel method and finally sintered at different temperatures. In order to investigate the structural properties, X-ray diffraction (XRD) measurement was carried out at room temperature that reveals the single phase of BNFO samples. For microstructural behaviors and granular morphology of nanostructures, scanning electron microscopy (SEM) was performed. It is observed that grain morphology gets improved with increase in sintering temperature. For elemental analysis, energy dispersive X-ray analysis (EDAX) was carried out for all BNFO samples, which reveal appropriate doping of Nd at Bi site in BNFO samples. Frequency dependent dielectric measurements show that the dielectric constant increases with increase in sintering temperature, which has been understood on the basis granular morphology of the samples. Frequency dependent dielectric behavior follows the universal dielectric response (UDR) model for all BNFO samples. Magnetodielectric (MD) effect has been investigated in the frequency range of 20 Hz–2 MHz, which shows a strong dependence of sintering temperature and granular morphology of the samples. AC conductivity was found to obey the Jonscher’s universal power law, which suggests the correlated barrier hopping (CBH) process as a responsible mechanism for charge conduction across the BNFO lattices.

In this manuscript, nanostructured Bi_0.95Nd_0.05FeO₃ multiferroics samples were prepared by using sol–gel method. These samples were finally sintered at different temperatures to alter their crystallite size and granular morphology. Sintering temperature and size dependent dielectric, magnetodielectric and ac conductivity behaviors of the samples have been understood using various models and mechanisms.

中文翻译：

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溶胶-凝胶生长的纳米结构Bi 0.95 Nd 0.05 FeO 3多铁的烧结温度依赖性电性能

摘要

在本文中，纳米结构的Bi _0.9 Nd _0.1 FeO ₃（BNFO）多铁化合物已通过溶胶-凝胶法成功合成，并最终在不同温度下烧结。为了研究结构性能，在室温下进行了X射线衍射（XRD）测量，揭示了BNFO样品的单相。对于纳米结构的微观结构行为和颗粒形态，进行了扫描电子显微镜（SEM）。观察到，随着烧结温度的升高，晶粒形态得到改善。对于元素分析，对所有BNFO样品进行了能量色散X射线分析（EDAX），这表明BNFO样品中Bi部位的Nd掺杂适当。随频率变化的介电测量结果表明，介电常数随烧结温度的升高而增加，根据样品的颗粒形态可以理解这一点。频率相关的介电行为遵循所有BNFO样品的通用介电响应（UDR）模型。在20 Hz–2 MHz的频率范围内对磁电（MD）效应进行了研究，这表明烧结温度和样品的颗粒形态具有很强的依赖性。发现交流电传导性遵循Jonscher的通用幂定律，这表明相关的势垒跳跃（CBH）过程是负责BNFO晶格中电荷传导的负责任机制。这表明烧结温度和样品的颗粒形态有很大关系。发现交流电传导性遵循Jonscher的通用幂定律，这表明相关的势垒跳跃（CBH）过程是负责BNFO晶格中电荷传导的负责任机制。这表明烧结温度和样品的颗粒形态有很大关系。发现交流电传导性遵循Jonscher的通用幂定律，这表明相关的势垒跳跃（CBH）过程是负责BNFO晶格中电荷传导的负责任机制。