Low-frequency ferromagnetic resonance in nanocomposite manganites p-La0.78Mn0.99O3.5 and p-La0.80Mn1.04O3.5

The low-frequency ferromagnetic resonance (FMR) spectra of nanocomposite manganites p-La0.78Mn0.99O3.5 and p-La0.80Mn1.04O3.5 with the cubic perovskite structure and hole conductivity were studied. The samples were prepared under pressure of 7.5 GPa in oxygen atmosphere. It was found that the temperature dependence of FMR parameters in the vicinity of the Curie point is similar to that of magnetization. The characteristic time of decay of metastable magnetic phase above T* (metal-semiconductor transition) and the time of its formation below T* were determined.