<br>Fe 合金 Na-In 卤化物层状钙钛矿光学带隙和磁性能的化学控制,Chemistry of Materials

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Fe 合金 Na-In 卤化物层状钙钛矿光学带隙和磁性能的化学控制
Chemistry of Materials ( IF 8.6 ) Pub Date : 2024-05-20 , DOI: 10.1021/acs.chemmater.4c00393
Priyesh Yadav ₁ , Swati Khurana ₁ , Deepika Gill ₂ , Atiqur Rahman ₁ , Saswata Bhattacharya ₂ , Sameer Sapra ₁

Affiliation

最近在理解二维（2D）磁性材料的独特物理方面取得的突破引发了对新型层状磁性半导体的探索。与传统的无机二维范德华晶体相比，有机-无机杂化层状钙钛矿框架提供了更好的化学和结构多功能性。这些框架可以通过有机和无机成分的变化轻松调节其结构、光学、电子和磁性特性。在这里，我们报道了以苯乙基铵（PEA）阳离子作为有机间隔物的铁合金Na-In二维层状双钙钛矿。这些合金材料的粉末X射线衍射（PXRD）图表明，随着Fe ³⁺ 合金化，各个晶面的d间距发生不同的变化。紫外可见吸收光谱表明它们的光学带隙随 Fe ³⁺ 的量高度可调。磁化率测量表明这些合金材料中存在反铁磁 (AFM) 耦合。居里常数 (C)、居里-韦斯温度 (θ _CW ) 和几何挫败因子下限值高度依赖于 Fe ³⁺ 合金化量。这些层状双钙钛矿（LDP）。我们的研究展示了这些过渡金属合金LDP中发现的丰富且令人着迷的磁性，从而为多功能磁性材料的开发开辟了途径。

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Chemical Control of Optical Band Gap and Magnetic Properties in Fe-Alloyed Na–In Halide Layered Perovskites

The recent breakthroughs in understanding the unique physics of two-dimensional (2D) magnetic materials have ignited the exploration of new types of layered magnetic semiconductors. In contrast to conventional inorganic 2D van der Waals crystals, hybrid organic–inorganic layered perovskite frameworks provide better chemical and structural versatility. These frameworks allow for easy modulation of their structural, optical, electronic, and magnetic properties through variation of both organic and inorganic components. Here, we report the Fe-alloyed Na–In 2D layered double perovskite with a phenylethylammonium (PEA) cation as the organic spacer. Powder X-ray diffraction (PXRD) patterns of these alloyed materials show that the d-spacing of various planes changes differently with Fe³⁺ alloying. UV–vis absorption spectra depict that their optical band gap is highly tunable with the Fe³⁺ amount. Magnetic susceptibility measurements indicate an antiferromagnetic (AFM) coupling in these alloyed materials. The values of the Curie constant (C), Curie–Weiss temperature (θ_CW), and lower bound value of geometrical frustration factors are highly dependent on the amount of Fe³⁺ alloying in these layered double perovskites (LDPs). Our research illustrates the abundant and fascinating magnetic properties found in these transition-metal-alloyed LDPs, thereby opening avenues for the development of multifunctional magnetic materials.

更新日期：2024-05-20

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