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Magnetization enhancement in nanocrystalline Co0.4Zn0.6Fe2O4 by 200 MeV Ag15+ ion irradiation

The effects of 200 MeV Ag15+ ion irradiation on the magnetic behavior of nano particles of Co0.4Zn0.6Fe2O4 have been studied using the field, temperature and time-dependent magnetization measurements. Rietveld profile refinement of the XRD patterns confirms the formation of a cubic spinel structure of the specimens retaining the spinel structure upon irradiation. The Ag15+ ion irradiation of the sample causes an appreciable enhancement in the saturation magnetization, coercivity, and remanent magnetization. These observations can be attributed to a slight increase in the particle size due to the heat evolved during the irradiation, cation redistribution, and irradiation-induced modifications on the surface states of the nanoparticles.