Crystallization and phase transition boosted optical linear& nonlinear and magnetic properties in transparent xCu: BaSnO3 NCs/glass-ceramic

IF 5.8 2区 材料科学 Q1 MATERIALS SCIENCE, CERAMICS Journal of The European Ceramic Society Pub Date : 2024-11-02 DOI:10.1016/j.jeurceramsoc.2024.117034
Yuandong Xu , Qiuling Chen , Chunlong Guan
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Abstract

In this study, cubic xCu: BaSnO3 (x = 0, 1, 3, and 5 mol%) perovskite nanocrystals were synthesized using a hydrothermal method. The influence of Cu doping levels on the crystal structure, morphology, size, and properties was analyzed using X-ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FT-IR), Raman, Ultraviolet-Visible Spectroscopy (UV–vis), Vibrating Sample Magnetometry (VSM), and X-ray Photoelectron Spectroscopy (XPS) techniques. Across the 1–5 % doping range, the cubic BaSnO3 structure was maintained with Cu2+ in CuO6 replacing Sn4+ in the B-site. XPS analysis confirmed the formation of oxygen vacancies due to charge imbalance, leading to a decrease in optical bandgap and an increase in ferromagnetic moment. When various contents of xCu: BaSnO3 were doped into borosilicate glass, significant impacts on the glass network, crystallization, and properties were observed. Nanocrystals (∼50 nm) transitioned from cubic to orthorhombic phase beyond 3 mol% doping, modifying the glass network by converting BO3 to BO4, AlO4 to AlO6, and CuO6 to CuO4. This phase change endowed the glass's strong ferromagnetic moment and absorption due to the t2 g→eg transitions of Cu2+ in CuO6, and reduced the optical bandgap from 3.16 to 2.2 eV. The glass also exhibited improved Vickers hardness (475 HV) and a high Verdet constant of 0.174 min/G·cm due to network modifications. Glass also shows a distinct red emission at 596 nm with a 160 µs lifetime and good thermal stability, while doping levels above 3 % resulted in emission quenching. The optical nonlinear absorption coefficient and nonlinear susceptibility increased with higher doping levels, reaching huge values of α3: 5.12×10−10 m/W and χ(3): 7.52×10−10 esu, indicating potential for self-focusing applications. The increased polarizability also resulted in a high dielectric constant (18) and a large P-E loop of glasses which are promising for advanced photonics devices.
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透明 xCu.BaSnO3 NC/玻璃陶瓷中的结晶和相变促进了光学线性、非线性和磁性能的提高:BaSnO3 NCs/玻璃陶瓷
本研究采用水热法合成了立方体 xCu:BaSnO3(x = 0、1、3 和 5 mol%)的过氧化物纳米晶体。采用 X 射线衍射 (XRD)、傅立叶变换红外光谱 (FT-IR)、拉曼光谱、紫外可见光谱 (UV-vis)、振动样品磁强计 (VSM) 和 X 射线光电子能谱 (XPS) 技术分析了铜掺杂水平对晶体结构、形态、尺寸和性质的影响。在 1-5 % 的掺杂范围内,立方体 BaSnO3 结构保持不变,CuO6 中的 Cu2+ 取代了 B 位上的 Sn4+。XPS 分析证实,由于电荷失衡形成了氧空位,导致光带隙减小,铁磁矩增大。当不同含量的 xCu:在硼硅玻璃中掺入不同含量的 xCu:BaSnO3 时,观察到其对玻璃网络、结晶和性能的显著影响。当掺杂量超过 3 摩尔%时,纳米晶体(∼50 nm)从立方相转变为正方相,通过将 BO3 转变为 BO4、AlO4 转变为 AlO6 以及 CuO6 转变为 CuO4 来改变玻璃网络。由于 CuO6 中 Cu2+ 的 t2 g→eg 转变,这种相变赋予了玻璃强大的铁磁矩和吸收能力,并将光带隙从 3.16 eV 降至 2.2 eV。由于网络改性,玻璃的维氏硬度(475 HV)也有所提高,维尔德常数高达 0.174 min/G-cm。玻璃还在 596 纳米波长处显示出明显的红色发射,其寿命为 160 微秒,具有良好的热稳定性,而掺杂水平超过 3% 则会导致发射淬灭。随着掺杂水平的提高,光学非线性吸收系数和非线性电感也随之增加,分别达到α3:5.12×10-10 m/W和χ(3):7.52×10-10 esu:7.52×10-10 esu,显示了自聚焦应用的潜力。偏振性的提高还导致了玻璃的高介电常数(18)和大 P-E 环,这对于先进的光子器件来说是大有可为的。
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来源期刊
Journal of The European Ceramic Society
Journal of The European Ceramic Society 工程技术-材料科学:硅酸盐
CiteScore
10.70
自引率
12.30%
发文量
863
审稿时长
35 days
期刊介绍: The Journal of the European Ceramic Society publishes the results of original research and reviews relating to ceramic materials. Papers of either an experimental or theoretical character will be welcomed on a fully international basis. The emphasis is on novel generic science concerning the relationships between processing, microstructure and properties of polycrystalline ceramics consolidated at high temperature. Papers may relate to any of the conventional categories of ceramic: structural, functional, traditional or composite. The central objective is to sustain a high standard of research quality by means of appropriate reviewing procedures.
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