In-depthstudy of the Chromite Compound LaNdSrAgCrO3 Structure, Dielectricity, Magnetic and Technological Application RecentAdvances

IF 1.8 4区物理与天体物理 Q3 PHYSICS, APPLIED

Journal of Superconductivity and Novel Magnetism Pub Date : 2026-10-05 DOI:10.1007/s10948-026-07250-4

H. Issaoui, M. Brahmi, F. Issaoui, E. dhahri, Benilde F.O. Costa, Bernardo A. Nogueira, Rui Fausto

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引用次数: 0

Abstract

This work investigates the structural, magnetic, electrical, and dielectric properties of the multi-element A-site substituted perovskite La₀.₅₇Nd₀.₁₀Sr₀.₁₈Ag₀.₁₅CrO₃ (LNSACrO) synthesized by the sol–gel method. X-ray diffraction and Rietveld refinement confirm a rhombohedral structure with the R-3c space group. Raman and SEM analyses reveal lattice distortion and a polycrystalline microstructure. Magnetic measurements performed under 0.05 T show a complex magnetic behavior, with an antiferromagnetic transition at TN = 12 K and a ferromagnetic–paramagnetic transition at TC = 275 K, highlighting the influence of multi-cation A-site substitution on the magnetic ordering. Electrical measurements reveal thermally activated conduction with an activation energy of 0.280 eV, while the temperature dependence of the Jonscher exponent indicates a correlated barrier hopping (CBH) mechanism. Impedance analysis confirms non-Debye relaxation and distinct grain and grain-boundary contributions. These results demonstrate the strong coupling between A-site chemical disorder and the magnetic and electrical properties of LNSACrO, highlighting its potential for multifunctional magneto-dielectric and electronic applications.

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铬铁矿复合材料LaNdSrAgCrO3结构、介电、磁性及技术应用研究进展

本文研究了多元素a位取代钙钛矿La₀₅₇Nd₀₁₀Sr₀₁₈Ag₀的结构、磁性、电学和介电性能。由溶胶-凝胶法合成的₁₅CrO₃（LNSACrO）。x射线衍射和Rietveld细化证实了其具有R-3c空间群的菱形结构。拉曼和扫描电镜分析揭示了晶格畸变和多晶微观结构。在0.05 T下进行的磁测量显示出复杂的磁行为，在TN = 12 K时出现反铁磁转变，在TC = 275 K时出现铁磁-顺磁转变，突出了多阳离子a位取代对磁有序的影响。电学测量结果表明，热激活传导的活化能为0.280 eV，而Jonscher指数的温度依赖性表明了相关的垒跳（CBH）机制。阻抗分析证实了非德拜松弛和明显的晶粒和晶界贡献。这些结果证明了a位化学无序性与LNSACrO的磁性和电学性质之间的强耦合，突出了其在多功能磁介电和电子应用方面的潜力。

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来源期刊

Journal of Superconductivity and Novel Magnetism 物理-物理：凝聚态物理

CiteScore

3.70

自引率

11.10%

发文量

342

审稿时长

3.5 months

期刊介绍： The Journal of Superconductivity and Novel Magnetism serves as the international forum for the most current research and ideas in these fields. This highly acclaimed journal publishes peer-reviewed original papers, conference proceedings and invited review articles that examine all aspects of the science and technology of superconductivity, including new materials, new mechanisms, basic and technological properties, new phenomena, and small- and large-scale applications. Novel magnetism, which is expanding rapidly, is also featured in the journal. The journal focuses on such areas as spintronics, magnetic semiconductors, properties of magnetic multilayers, magnetoresistive materials and structures, magnetic oxides, etc. Novel superconducting and magnetic materials are complex compounds, and the journal publishes articles related to all aspects their study, such as sample preparation, spectroscopy and transport properties as well as various applications.