Abstract In this work, we report on the anisotropic growth of α -Fe2O3 nanoslabs which are produced by co-precipitation method with the addition of sucrose. In our previous work, we have argued that such behavior can be related with the chelating agent. Experiments of X-ray diffraction (XRD), high-resolution transmission electronic microscopy (HRTEM) and magnetic measurements as a function of temperature and an applied magnetic field are used to characterize the samples. The HRTEM image of the sample prepared with 10 mmol/l of sucrose consists of faceted-like nanoslabs while that prepared without sucrose exhibits particles with a non-uniform shape. In this way, we can state that both the HRTEM images and the analysis of the XRD patterns show clearly a preferential growth of the [110] crystallographic direction. To strengthen our supposition, besides T- and field-dependence of magnetization are consistent with a superparamagnetic behavior the fit of the (Zero Field Cooling and Field Cooling) ZFC-FC curve for sample grown with 10 mmol/l of sucrose presents a strong increase of the effective anisotropy constant, K eff , which can be related with the increasing of the shape magnetic anisotropy.

中文翻译：

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α -Fe 2 O 3 纳米结构的各向异性生长

摘要 在这项工作中，我们报告了通过添加蔗糖的共沉淀法制备的 α -Fe2O3 纳米板的各向异性生长。在我们之前的工作中，我们认为这种行为可能与螯合剂有关。X 射线衍射 (XRD)、高分辨率透射电子显微镜 (HRTEM) 和作为温度和外加磁场函数的磁测量实验用于表征样品。用 10 mmol/l 蔗糖制备的样品的 HRTEM 图像由小面状纳米板组成，而没有蔗糖制备的样品显示出形状不均匀的颗粒。通过这种方式，我们可以说 HRTEM 图像和 XRD 图案的分析都清楚地显示了 [110] 晶体方向的优先生长。为了加强我们的假设，