Comparative Analysis of Experimental Methods for Determining the Curie Temperature of Ferrite Materials

Magnetic phase transformations in the Curie temperature region of a ferrite material with the composition Ni0,4Zn0,6Fe2O4 were studied using thermomagnetometric analysis and methods for recording the temperature dependence of the initial magnetic permeability μ0(T) and electrical resistivity ρ(T). The description of the equipment utilized and the key characteristics of the application of the experimental methods under review are provided. During thermomagnetometry at the cooling stage, it was found that the temperature at which the material completes the transition to the ferrimagnetic state corresponds to the inflection point temperature on the µ0(T) curve and the breakpoint on the lnρ(T) plot. The established interaction between the parameters of transients can be useful for more correct determination of the Curie temperature in ferrites.