Spectroscopic study of nanosized KCoF3, KNiF3 and KCuF3 prepared at room temperature

A. Fernández-Osorio, A. Vázquez-Olmosb, R. Sato-Berrub
Universidad Nacional Autónoma de México, MX

Keywords: nanoparticles, fluorides, perovskite, Raman

Abstract:

Nanoscale fluorides have attracted a great deal of interest due to their unusual magnetic and electronic properties, these compounds are known to be antiferromagnetic insulators. The fluorides KNiF3, KCoF3 and KCuF3 with average diameters between 3 and 7 nm were easily obtained at room temperature using KF and their respective chlorides. The colors presented are: KCoF3 pink, KNiF3 green and KCuF3 blue. The results of XRD indicate that the products are nanostructured perovskites. The nanoparticles obtained were studied by UV-visible electronic absorption, Raman and Fluorescence spectroscopies. Their crystalline structures and morfology were determined from XRD patterns and HR-TEM images. The magnetic study of these systems is in progress.