Open AccessSynthesis of holmium orthoferrite nanoparticles by the co-precipitation method at high temperature
Author(s) -
Nguyễn Anh Tiến,
Truong Chi Hien,
Bùi Xuân Vương
Publication year - 2021
Publication title -
metallurgical and materials engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.161
H-Index - 2
eISSN - 2812-9105
pISSN - 2217-8961
DOI - 10.30544/612
Subject(s) - orthoferrite , materials science , holmium , coercivity , magnetization , nanoparticle , coprecipitation , paramagnetism , precipitation , remanence , annealing (glass) , hydrolysis , analytical chemistry (journal) , aqueous solution , chemical engineering , nuclear magnetic resonance , magnetic field , nanotechnology , metallurgy , chromatography , chemistry , condensed matter physics , optics , organic chemistry , laser , physics , engineering , quantum mechanics , meteorology
Holmium orthoferrite HoFeO3 nanoparticles were synthesized by a simple co-precipitation method via the hydrolysis of Ho (III) and Fe (III) cations in boiling water with 5% aqueous ammonia solution. After annealing the precipitate at 750 and 850 °C for 1 hour, the single-phase HoFeO3 product formed with particle size < 50 nm. The synthesized nanopowders are paramagnetic materials with remanent magnetization Mr < 0.01 emu·g-1, the coercive force Hc = 20÷21 Oe, and magnetization Ms ~ 2.73 emu·g-1 at 300 K in a maximum field of 16,000 Oe.