反铁磁性
材料科学
卤化物
范德瓦尔斯力
过渡金属
磁性半导体
挫折感
电介质
化学
凝聚态物理
半导体
无机化学
结晶学
分子
物理
光电子学
生物化学
催化作用
有机化学
作者
Jie Xue,Ziyu Wang,Andrew H. Comstock,Zhiyu Wang,Herman H. Y. Sung,Ian D. Williams,Dali Sun,Junwei Liu,Haipeng Lu
标识
DOI:10.1021/acs.chemmater.2c00163
摘要
Recent discoveries of novel physics in two-dimensional (2D) magnetic materials have sparked the search of new layered magnetic semiconductors. Compared to the traditional inorganic 2D van der Waals crystals, hybrid organic–inorganic metal–halide frameworks offer significantly enhanced chemical and structural versatility, where their optical, electronic, and magnetic properties can be readily modulated with both organic and inorganic components. Here, we reported a series of new Fe–Cl-based layered double perovskites LnMIMIIICl8, [n = 4, L = phenylethylammonium or chiral R-(+)-β-methylphenethylammonium and n = 2, L = 1,4-butanediammonium; MI = Ag/Na; MIII = Fe/In]. UV–vis measurements show that their optical band gaps are highly tunable by varying the organic cations, MI ion, and MIII ion. Magnetic susceptibility measurements suggest an antiferromagnetic coupling between the nearest FeIII–FeIII, where the Curie–Weiss temperature, Néel temperature, and frustration factors can be easily modulated with their compositions and dimensionality. Our study demonstrates the rich and interesting magnetic properties in these layered transition-metal–halide double perovskites and paves the way for design of multifunctional magnetic materials.
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