Open AccessSynthesis and Properties of Superparamagnetic Y-Fe2O3
Author(s) -
Volodymyr Kotsyubynsky,
V.V. Moklyak,
A. B. Hrubiak
Publication year - 2014
Publication title -
journal of vasyl stefanyk precarpathian national university
Language(s) - English
Resource type - Journals
eISSN - 2413-2349
pISSN - 2311-0155
DOI - 10.15330/jpnu.1.1.33-39
Subject(s) - superparamagnetism , materials science , annealing (glass) , thermal decomposition , sintering , crystal structure , line width , chemical engineering , analytical chemistry (journal) , crystallography , chemistry , magnetization , metallurgy , magnetic field , optics , organic chemistry , physics , quantum mechanics , engineering
Method of nanodispersed g-Fe2O3 synthesis by thermal decomposition of iron citrate is proposed. The investigations of obtained oxides crystalline and magnetic structures are done. Nanodispersed g-Fe2O3 with sizes of coherent scattering regions about 4-7 nm was is only one phase after gel sintering at 200, 250 and 300оС; the particles of synthesized materials are in a state of magnetic ordering and in superparamagnetic state. The influence of magnetic dipole interparticles interaction on parameters of Mossbauer spectra is observed. The phenomenological model of the differences between nanodispersed g-Fe2O3 magnetic microstructures obtained after annealing at different temperatures is presented.