Abstract
Fe3+ doped In2O3 nanocubes with different doped concentrations (from 5 at. % to 15 at. %) were prepared by direct solvothermal method and 10 at. % doped samples were then annealed under atmospheric conditions to investigate effects of annealing temperatures on their magnetic properties. The magnetic transitions from paramagnetic to ferromagnetic and again to paramagnetic occurred with increments of annealing temperatures, since the oxygen vacancies affected exchanges of two neighboring Fe3+ ions. Moreover, their magnetic properties were further demonstrated to be intrinsic by X-ray diffraction, high-resolution transmission electron microscopy, and X-ray energy dispersive spectrometry.
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