Structural, electrical, leakage current, and magnetic characteristics of double perovskite Nd2NiTiO6

IF 3.5 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS Journal of the American Ceramic Society Pub Date : 2024-09-24 DOI:10.1111/jace.20150

Sujan Malik, Abhigyan Dutta

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Abstract

This study investigates the structural, electrical, leakage current, and magnetic characteristics of the double perovskite material Nd₂NiTiO₆ synthesized through the sol–gel citrate auto-ignition method. The Rietveld refinement of the X-ray diffraction patterns confirmed a monoclinic symmetry (space group P2₁/n) with an ordered arrangement of alternate NiO₆ and TiO₆ octahedra. Impedance spectroscopic analysis exhibited the material's non–Debye-type relaxation mechanism and semi-conductive nature. AC conduction analysis revealed that the conduction of charge carriers occurs via the nonoverlapping small polaron hopping mechanism, consistent with Mott's variable range hopping model. Temperature- and frequency-dependent dielectric measurements were interpreted using the Maxwell–Wagner interfacial polarization model. The analysis of thermal- and field-dependent leakage currents established that conduction is ohmic, which the Schottky barrier model explains. Studies on magnetization ruled out the presence of magnetic ordering connected to indirect interaction between Ni²⁺ ions via Ti⁴⁺ ions and the rare-earth cation (Nd³⁺) moment.

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双包晶Nd2NiTiO6的结构、电气、漏电流和磁特性

本研究探讨了通过溶胶-凝胶柠檬酸盐自燃法合成的双包晶材料 Nd2NiTiO6 的结构、电学、漏电流和磁学特性。对 X 射线衍射图样进行的里特维尔德细化证实，该材料具有单斜对称性（空间群 P21/n），NiO6 和 TiO6 八面体交替有序排列。阻抗光谱分析显示了该材料的非德拜型弛豫机制和半导电性质。交流传导分析表明，电荷载流子的传导是通过非重叠小极子跳变机制实现的，与莫特的变程跳变模型相一致。随温度和频率变化的介电测量结果是利用麦克斯韦尔-瓦格纳界面极化模型解释的。通过分析随温度和电场变化的漏电流，确定了肖特基势垒模型所解释的欧姆传导。磁化研究排除了与 Ni2+ 离子通过 Ti4+ 离子和稀土阳离子 (Nd3+) 间矩的间接相互作用有关的磁有序性的存在。

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来源期刊

Journal of the American Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

7.50

自引率

7.70%

发文量

590

审稿时长

2.1 months

期刊介绍： The Journal of the American Ceramic Society contains records of original research that provide insight into or describe the science of ceramic and glass materials and composites based on ceramics and glasses. These papers include reports on discovery, characterization, and analysis of new inorganic, non-metallic materials; synthesis methods; phase relationships; processing approaches; microstructure-property relationships; and functionalities. Of great interest are works that support understanding founded on fundamental principles using experimental, theoretical, or computational methods or combinations of those approaches. All the published papers must be of enduring value and relevant to the science of ceramics and glasses or composites based on those materials. Papers on fundamental ceramic and glass science are welcome including those in the following areas: Enabling materials for grand challenges[...] Materials design, selection, synthesis and processing methods[...] Characterization of compositions, structures, defects, and properties along with new methods [...] Mechanisms, Theory, Modeling, and Simulation[...] JACerS accepts submissions of full-length Articles reporting original research, in-depth Feature Articles, Reviews of the state-of-the-art with compelling analysis, and Rapid Communications which are short papers with sufficient novelty or impact to justify swift publication.

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