Magnetic characteristics of Mg[Fe.sub.2][O.sub.4] nanoparticles obtained by glycine-nitrate synthesis

The magnetic properties of magnesium-iron spinel (Mg[Fe.sub.2][O.sub.4]) powdered nanoparticles obtained by glycine-nitrate synthesis are investigated by X-ray phase analysis and the NMR method. According to the results of X-ray phase analysis, the average size of the crystalline part of nanoparticles of the powder under investigation is 45 [+ or -] 4 nm. Magnetization J is determined using the formula J = (B/[μ.sub.0]) - H, where B and H are the induction and strength of the magnetic field in the sample, which are measured by the NMR method. The magnetic characteristics of Mg[Fe.sub.2][O.sub.4] are as follows: specific saturation magnetization [J.sub.sat] = 17.52 A [m.sup.2]/kg, specific residual magnetization [J.sub.r] = 5.73 A [m.sup.2]/kg, coercive force [H.sub.c] = 4600 A/m, and magnetic moment [P.sub.sat] = 371 x 10 20 A [m.sup.2] in the magnetic saturation state and [P.sub.r] = 121 x [10.sup.-20] A [m.sup.2] in the residual magnetization state. DOI: 10.1134/S1063784216020274