Open AccessStructural and magnetic properties of Ho-doped CuFe2O4 nanoparticles prepared by a simple co-precipitation method
Author(s) -
Бао Ханг Хоанг,
В. О. Миттова,
Nguyễn Anh Tiến,
Pham Thi Hong Duyen
Publication year - 2022
Publication title -
kondensirovannye sredy i mežfaznye granicy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.13
H-Index - 2
eISSN - 2687-0711
pISSN - 1606-867X
DOI - 10.17308/kcmf.2022.24/9061
Subject(s) - nanocrystalline material , coercivity , materials science , spinel , crystallite , analytical chemistry (journal) , transmission electron microscopy , coprecipitation , magnetization , nanoparticle , doping , scanning electron microscope , annealing (glass) , superparamagnetism , ferrite (magnet) , chemical engineering , metallurgy , nanotechnology , chemistry , condensed matter physics , composite material , magnetic field , chromatography , physics , optoelectronics , quantum mechanics , engineering
Nanocrystalline copper (II) ferrite with a spinel structure doped with holmium was synthesized by co-precipitation using an aqueous solution of NaOH as a precipitant and subsequent annealing at 800°C for 60 min. The doping limit was determined by X-ray phase analysis. The similarity of the real and nominal compositions of the doped samples was established by energy-dispersive X-ray spectroscopy using a scanning electron microscope. The obtained particles had an approximately spherical shape, and their size was 40–70 nm (X-ray phase analysis, transmission electron microscopy). The introduction of Ho3+ cations to х = 0.15 into a CuFe2O4 spinel lattice led to a decrease in the average size of crystallites, an increase inthe coercive force of nanopowders, and a decrease in excess magnetization and saturation magnetization. Synthesized CuFe2-xHoxO4 (х = 0, 0.1 and 0.15) nanopowders were magnetically hard materials with high coercive force.