中文摘要：

通过电热板在空气中直接加热氧化沉积在硅基片上的Fe膜,在其表面上获得大面积α-Fe2O3 纳米带,这-方法为制备大面积氧化物纳米结构提供了-种非常简单的工艺.研究了所制备的α-Fe2O3 纳米带的形貌、晶体结构、生长机制及其磁性能.α-Fe2O3纳米带呈尖锐状并沿[110]方向垂直基片生长,其顶端为10~50nm,长度为几百纳米至几微米.α-Fe2O3 纳米带在较低温度下的生长过程是一种扩散机制.α-Fe2O3 纳米结构的Morin温度T M 、Néel温度TN 分别为113和814K,与其块体材料相比均降低了150K左右.

英文摘要：

Large-areaα-Fe2 O3 nanobelts were synthesized by heating the Fe film on silicon substrate in air,using a very simple hotplate technique.The morphologies,crystal structures,growth mechanism and magnetic prop-erties of the nanobelts were investigated.The results showed that single-crystalα-Fe2 O3 nanobelts grew per-pendicularly to the substrate along [110]direction with a very sharp tip about 10-50 nm.The length of the nanobelts were from hundreds nanometers to several micrometers.A diffusion mechanism was responsible for theα-Fe2 O3 nanostructure growth at relatively low temperatures.The Morin temperature TM and Néel temper-ature TN ofα-Fe2 O3 nanostructures were only 113 and 814 K,respectively,which were about 150 K lower than those for their bulk counterpart.