The XRD pattern of the CoFe2O4 powder sample.
Electron micrograph of CoFe2O4 particles. The inset shows the particle size distribution with the statistics of 250 particles.
Family of magnetization curves of the nano-dispersed system of CoFe2O4 particles for low- (a) and high-temperature (b) ranges.
Hysteresis loops for the low-temperature range 4.2–250 K (a) and fragments of hysteresis loops for the high-temperature range 300–500 K (b) for the nano-dispersed system of CoFe2O4 particles.
Temperature dependence of the coercive force. Inset: the high-temperature fragment.
The temperature dependence of the effective magnetic anisotropy field, and the partial contributions of the system of CoFe2O4 nanocrystals forming it, compared to the magnetocrystalline anisotropy of a macroscopic analogue.
Temperature dependence of the specific magnetization in a magnetic field of 4000 kA/m. The inset shows the high-field susceptibility dσ/dH = f(T).
Article metrics loading...
Full text loading...