Synthesis and Properties of Superparamagnetic Y-Fe2O3
DOI:
https://doi.org/10.15330/jpnu.1.1.33-39Keywords:
Y-Fe2O3, mossbauer, superparamagneticAbstract
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.