Influence of hollow structure on the magnetic characteristics for Fe3O4 submicron spheres, The
In this paper, nearly monodisperse Fe3O4 hollow and solid submicron spheres were synthesized using a simple solvothermal method. The TEM investigation clearly reveals the successful realization of the hollow structure of magnetite spherical particles by the method. The average diameter of the Fe3O4 hollow and solid submicron spheres is about 300 and 500 nm, respectively. The submicron spheres are composed of nanometer-sized grains, with grain sizes of 21 and 28 nm for the hollow and solid spheres, respectively. Magnetic hysteresis measurements indicate that the hollow structure has higher coercive ...
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