Abstract:
Experiments on the Mössbauer effect on $^{57}$Fe nuclei in ferrite Ni$_{0.3}$Gd$_{0.7}$Fe$_2$O$_4$ revealed the absence of a magnetic hyperfine structure of $^{57}$Fe nuclei in the magnetically ordered temperature range. The phenomenon is explained by the increased frequency of relaxation of the magnetic moments of iron ions in ferrite. Studies carried out in external magnetic fields have shown that in ferrite there are groups of iron spins with different relaxation times.
Keywords:ferrite, magnetic moment, magnetization, Curie temperature, relaxation process, Mössbauer effect.
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