Magnetic characteristics of Fe₃O₄/α–Fe₂O₃ hybrid cubes Available to Purchase

The high spin polarized Fe₃O₄ was incorporated with α-Fe₂O₃ to form micro-cubes with high Curie temperature. It was observed that the magnetic characteristics of such hybrid structure are quite different from those of pure Fe₃O₄ or α-Fe₂O₃ phase, such as the absence of hematite Morin transition and the strong temperature dependence of magnetite saturated magnetization. The absence of Morin transition in Fe₃O₄/α-Fe₂O₃ hybrid cubes not only excludes the possibility of simply mixture of Fe₃O₄ and α-Fe₂O₃ components during the synthetic process, but also confirms that the introduction of high spin polarized Fe₃O₄ provides another way for the extinction of hematite Morin temperature apart from formerly reported factors, such as the particle size, shape, crystallinity, and surface properties. Moreover, the observed strong temperature dependence of magnetite saturation behavior has not been reported experimentally so far. Both intriguing phenomena could be ascribed to the magnetic interactions between Fe₃O₄ and α-Fe₂O₃ components, which are of great importance not only for the understanding of mutually magnetic influence between high spin polarized materials and semiconducting matrix, but also for the potential applications in fabricating spin devices.