SYNTHESIS AND PROPERTIES OF SUPERPARAMAGNETIC Gamma-FE2O3Journal: Journal of Vasyl Stefanyk Precarpathian National University (Vol.1, No. 1)
Publication Date: 2014-04-01
Authors : V.O. KOTSYUBYNSKY; V.V. MOKLYAK; A.B. HRUBIAK;
Page : 33-39
Keywords : ?-Fe2O3; mossbauer; superparamagnetic.;
Method of nanodispersed Gamma-Fe2O3 synthesis by thermal decomposition of iron citrate is proposed. The investigations of obtained oxides crystalline and magnetic structures are done. Nanodispersed Gamma-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 ?-Fe2O3 magnetic microstructures obtained after annealing at different temperatures is presented.
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