Multifaceted Spectroscopic Study of Electrical and Optical Properties in Sodium Manganese Oxide Ceramics

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Journal of Alloys and Compounds Pub Date : 2025-08-09 DOI:10.1016/j.jallcom.2025.182927

Marwa Krichen, Narimen Chakchouk, Ebtehal Elghmaz, Fadhel Hajlaoui, Karim Karoui

{"title":"Multifaceted Spectroscopic Study of Electrical and Optical Properties in Sodium Manganese Oxide Ceramics","authors":"Marwa Krichen, Narimen Chakchouk, Ebtehal Elghmaz, Fadhel Hajlaoui, Karim Karoui","doi":"10.1016/j.jallcom.2025.182927","DOIUrl":null,"url":null,"abstract":"NaMn2O4 ceramic was successfully synthesized via a high-temperature solid-state reaction. Its structural, optical, and electrical transport properties were comprehensively investigated. Rietveld refinement of X-ray diffraction data confirmed that the compound crystallizes in the orthorhombic system with the Pnam space group. Optical measurements using UV–Vis spectroscopy revealed a direct band gap of approximately 2.64±0.002 eV, confirming the semiconducting nature of NaMn2O4 and suggesting its suitability for optoelectronic and energy-related applications. Electrical characterization was carried out using impedance spectroscopy over a frequency range of 1 Hz to 1 MHz and a temperature range of 303–423 K. The AC conductivity was analyzed using Jonscher’s power law, and the conduction mechanism was found to follow the Overlapping Large Polaron Tunneling (OLPT) model. This indicates that ionic transport occurs via thermally activated hopping of Na+ ions along the [001] tunnel direction, while electronic conduction is facilitated by electron hopping between Mn3+ and Mn4+.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"31 1","pages":""},"PeriodicalIF":6.3000,"publicationDate":"2025-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Alloys and Compounds","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1016/j.jallcom.2025.182927","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}

引用次数: 0

Abstract

NaMn₂O₄ ceramic was successfully synthesized via a high-temperature solid-state reaction. Its structural, optical, and electrical transport properties were comprehensively investigated. Rietveld refinement of X-ray diffraction data confirmed that the compound crystallizes in the orthorhombic system with the Pnam space group. Optical measurements using UV–Vis spectroscopy revealed a direct band gap of approximately 2.64±0.002 eV, confirming the semiconducting nature of NaMn₂O₄ and suggesting its suitability for optoelectronic and energy-related applications. Electrical characterization was carried out using impedance spectroscopy over a frequency range of 1 Hz to 1 MHz and a temperature range of 303–423 K. The AC conductivity was analyzed using Jonscher’s power law, and the conduction mechanism was found to follow the Overlapping Large Polaron Tunneling (OLPT) model. This indicates that ionic transport occurs via thermally activated hopping of Na⁺ ions along the [001] tunnel direction, while electronic conduction is facilitated by electron hopping between Mn³⁺ and Mn⁴⁺.

Abstract Image

查看原文本刊更多论文

氧化锰钠陶瓷电学和光学性质的多面光谱研究

采用高温固相反应法制备了NaMn2O4陶瓷。对其结构、光学和电输运性质进行了全面研究。x射线衍射数据的Rietveld细化证实了化合物在具有Pnam空间群的正交体系中结晶。紫外可见光谱的光学测量显示，其直接带隙约为2.64±0.002 eV，证实了NaMn2O4的半导体性质，并表明其适合光电和能源相关应用。电学表征使用阻抗谱进行，频率范围为1 Hz至1 MHz，温度范围为303-423 K。利用Jonscher幂定律分析了交流电导率，发现导电机制遵循重叠大极化子隧道（OLPT）模型。这表明离子传递是通过Na+离子沿[001]隧道方向的热激活跳变来实现的，而电子传导则是通过Mn3+和Mn4+之间的电子跳变来实现的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Journal of Alloys and Compounds 工程技术-材料科学：综合

CiteScore

11.10

自引率

14.50%

发文量

5146

审稿时长

67 days

期刊介绍： The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.