Magnetic properties dependence on Fe 2+ /Fe 3+ and oxygen vacancies in SrTi 0.95 Fe 0.05 O 3 nanocrystalline prepared by hydrothermal method

Magnetizations of annealed SrTi0.95Fe0.05O3 nanoparticles at 500, 600 and 700°C in Ar for 3h. The increase of annealing temperature can increase the cations ratio of Fe2+/Fe3+ and oxygen vacancy, resulting in the increase of saturation magnetization due to the existence of the Fe2+–VO2−–Fe2+ coupling more than that of the Fe3+–VO2−–Fe3+.