Magnetic and resonant properties of ferrite compositions (1 − x)MeFe₂O₄ · xP₂O₅ prepared by plasma spraying

It was found that after plasma spraying and rapid quenching of ferrite compositions (1 − x )MeFe 2 O 4 · x P 2 O 5 within the range of 0.35 < x < 0.4 for any considered compounds, transition to the x-ray-amorphous state is observed (so called concentration depended transition (CDT). This transition occurs along with modification of x-ray and Mössbauer spectra (quadrupole splitting into isomer shift) and changing their magnetic parameters: a saturation magnetization σ s , a coercive field H c and a line width of ferromagnetic resonance (FMR) Δ H . The abnormal increase of saturation magnetization σ s is revealed at T < 100 K. Particularities of changing the Curie temperature T c and a saturation magnetization σ s at different rates of quenching ferrites from the liquid state are discussed. Highlights • We studied the influence of the ferrite compositions inclusion on their magnetic state; • We studied the behavior of the magnetic parameters ( T c , σ s , H c ) of spinel ferrites under different conditions of rapid quenching; • We studied the γ -spectra of ferrite compositions; • We studied the behavior of the magnetic parameters H c and Δ H at concentration transitions (CDT).