Deciphering the Role of Dipolar Interactions in Magnetic Layered Double Hydroxides
作者:Jose A. Carrasco、Salvador Cardona-Serra、Juan Modesto Clemente-Juan、Alejandro Gaita-Ariño、Gonzalo Abellán、Eugenio Coronado
DOI:10.1021/acs.inorgchem.7b02928
日期:2018.2.19
ability to be exfoliated into 2D nanosheets, which can be used as a building block to fabricate a wide variety of hybrid functional nanostructured materials. Still, if one wants to use LDHs as a magnetic building blocks in the design of complex architectures, the role played by the dipolar magnetic interactions in these layered materials needs to be understood. In this work, we synthesized and characterized
层状双氢氧化物(LDH)展现出无与伦比的阴离子交换性能,并具有剥落成2D纳米片的能力,可以用作构建多种杂化功能纳米结构材料的基础。但是,如果要在复杂体系结构的设计中使用LDH作为磁性构建基块,则需要了解这些层状材料中偶极磁性相互作用所起的作用。在这项工作中,我们合成并表征了基元间距为7.5至34Å的五元CoAl-LDH系列。详细的实验表征使我们得出结论,控制磁性层之间偶极相互作用的主要因素不能是层间间距。支持理论建模的方法反而暗示了自旋相关大小的相关作用,极限值与层的横向尺寸有关。这些结果突出了阳离子有序在LDHs磁性行为中的重要性,并支持了同金属层状氢氧化物之间的差异。