Structure, EPR, and Mössbauer spectra of La0.8Sr0.2FeO3 nanocrystals modified magnetic glass-ceramics

IF 1.8 4区材料科学 Q2 MATERIALS SCIENCE, CERAMICS

Journal of the Australian Ceramic Society Pub Date : 2023-08-16 DOI:10.1007/s41779-023-00942-3

Qiuling Chen, Jianhua Fan, Qiuhua Ma

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Abstract

In this study, perovskite La_0.8Sr_0.2FeO₃ nanocrystals were formed in heavy metal oxide glass under Al₂O₃ tailoring. The influence of formation of La_0.8Sr_0.2FeO₃ to glass structure and magnetic behavior was studied through various techniques such as X-ray diffraction, Raman, X-ray photoelectron microscopy, electron paramagnetic resonance, and Mössbauer spectra. The 10-30 nm-orthogonal La_0.8Sr_0.2FeO₃ nanocrystals were synthesized and well distributed in glass whose structure and coordination numbers of B₂O₃, Al₂O₃, and Bi₂O₃ were changed by the La_0.8Sr_0.2FeO₃ crystallization. Aluminum abnormality effect was observed in 10%Al₂O₃ doped glass which showed highest transparency, smallest La_0.8Sr_0.2FeO₃ size (10 nm) and least non-bridging oxygen defects. The glass with 10%Al₂O₃ exhibited enhanced electron paramagnetic resonance signal, highest (71%) tetrahedral FeO₄ units and improved Mössbauer sextets intensity which is promising for photonics device applications.

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La0.8Sr0.2FeO3纳米晶改性磁性玻璃陶瓷的结构、EPR和穆斯堡尔谱

本研究在重金属氧化物玻璃中形成了包晶 La0.8Sr0.2FeO3 纳米晶体，并对其进行了 Al2O3 裁剪。通过 X 射线衍射、拉曼、X 射线光电子显微镜、电子顺磁共振和莫斯鲍尔光谱等多种技术研究了 La0.8Sr0.2FeO3 的形成对玻璃结构和磁性行为的影响。合成了 10-30 nm 正交的 La0.8Sr0.2FeO3 纳米晶体并在玻璃中良好分布，La0.8Sr0.2FeO3 结晶改变了 B2O3、Al2O3 和 Bi2O3 的结构和配位数。在掺杂 10%Al2O3 的玻璃中观察到了铝的异常效应，其透明度最高，La0.8Sr0.2FeO3 尺寸最小（10 nm），非桥接氧缺陷最少。掺有 10%Al2O3 的玻璃显示出更强的电子顺磁共振信号、最高（71%）的四面体 FeO4 单元和更高的摩斯鲍尔六次方强度，这对光子设备应用很有前景。

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来源期刊

Journal of the Australian Ceramic Society Materials Science-Materials Chemistry

CiteScore

3.70

自引率

5.30%

发文量

123

期刊介绍： Publishes high quality research and technical papers in all areas of ceramic and related materials Spans the broad and growing fields of ceramic technology, material science and bioceramics Chronicles new advances in ceramic materials, manufacturing processes and applications Journal of the Australian Ceramic Society since 1965 Professional language editing service is available through our affiliates Nature Research Editing Service and American Journal Experts at the author''s cost and does not guarantee that the manuscript will be reviewed or accepted