Expounding the structural behaviour of Nd0.5-xNaxSr0.5MnO3 (x=0, 0.05, 0.10) manganites

IF 5.8 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Journal of Alloys and Compounds Pub Date : 2024-11-26 DOI:10.1016/j.jallcom.2024.177789

, M.S. Murari, Mamatha D Daivajna

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Abstract

The investigation of structure and x-ray photoemission spectroscopic study on Nd_0.5-xNa_xSr_0.5MnO₃ with (x=0,0.05,0.10) polycrystalline samples have been performed. The bulk polycrystalline samples were prepared by flux-assisted solid-state reaction method. The samples are showing mixed phases of orthorhombic (Imma and Pnma) and Tetragonal (I4/mcm) structure at room temperature. The morphological properties are probed using field emission scanning electron microscopy. The grains are irregular and distribution of grain sizes showing a log-normal kind of distribution. The Fourier transform infrared spectra show three prominent absorption bands corresponds to MnO₆ the octahedra. A systematic analysis of electronic structures and chemical properties was conducted using the X-ray photoemission spectroscopy technique. The oxygen non-stoichiometry and its influence on the relative proportion of Mn³⁺/Mn⁴⁺ ions in all samples are assessed by examining the areas beneath the deconvoluted X-Ray Photoelectron Spectra (XPS) of the core level spectra.

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阐述 Nd0.5-xNaxSr0.5MnO3 (x=0, 0.05, 0.10) 锰矿的结构特性

对(x=0,0.05,0.10)多晶样品 Nd0.5-xNaxSr0.5MnO3 的结构和 x 射线光发射光谱进行了研究。块状多晶样品是通过助熔剂辅助固态反应法制备的。样品在室温下呈现出正交（Imma 和 Pnma）和四方（I4/mcm）结构的混合相。使用场发射扫描电子显微镜探测了样品的形态特性。晶粒不规则，粒度分布呈对数正态分布。傅立叶变换红外光谱显示出三个与八面体 MnO6 相对应的突出吸收带。利用 X 射线光发射光谱技术对电子结构和化学性质进行了系统分析。通过检查去卷积 X 射线光电子能谱（XPS）核心级光谱下方的区域，评估了所有样品中氧的非全度性及其对 Mn³⁺/Mn⁴⁺ 离子相对比例的影响。

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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.