화학공학소재연구정보센터
Materials Research Bulletin, Vol.64, 93-96, 2015
Amorphous RE-Fe-B-Na colloidal nanoparticles: High temperature solution synthesis and magnetic properties
RE-Fe-B-Na (RE = Nd-Er) colloidal nanoparticles are prepared by high-temperature solution synthesis. These nanoparticles are ultra-small monodisperse, air-stable and amorphous, whose particle size and magnetic property are characterized by transmission electron microscope and superconducting quantum interference device. Taking Nd-Fe-B-Na nanoparticle as an example, it is found that the particle size can be controlled in less than 7 nm. Besides, the magnetic properties of RE-Fe-B-Na colloidal nanoparticles can be compared for different rare earth elements. Based on the bulk ferromagnetic coupling, other possible magnetic coupling mechanism is discussed. (C) 2014 Elsevier Ltd. All rights reserved.