Influence of structural transitions of BaTiO₃ on the magnetic properties of Fe nanoparticles

Ferroelectric BaTiO₃ single crystals with (001) orientation were implanted with Fe at room temperature with an energy of 100 keV and a fluence of 1×10¹⁷ cm^-2. For the implanted crystals, the analysis of the magnetic properties shows that Fe nanoparticles are formed and display characteristic superparamagnetic behaviour. The thermal dependence of the nanoparticles magnetisation shows the signature of the structural phase transitions of BaTiO₃ with changes in the magnetisations values and thermal hysteresis observed at related temperatures.