非均匀体系金属磁性材料中观察到的增强的反常霍尔效应具有巨大的潜在应用价值，然而由于其反常霍尔系数还不能和半导体的相比，这阻碍了它的广泛应用，因而迫切需要从新体系开发、制备方法、增强机理和调控手段上开展创新性研究。本项目拟通过具有特色的纳米粒子束流颗粒膜沉积设备，利用该设备可以独立控制颗粒尺寸、颗粒合金成分、无序度和颗粒表面修饰的特点，针对单一组元Co、Ni金属纳米粒子和双金属Fe-Ni、Co-Pt合金纳米粒子，制备有别于传统颗粒膜的新型纳米粒子组装薄膜，并围绕该颗粒膜的界面特性、颗粒尺寸均一性、粒径大小、颗粒无序度以及颗粒表面修饰与反常霍尔效应的关系及其机理展开一系列深入研究，力图明确颗粒膜中各因素对反常霍尔效应的确切贡献，阐明各因素对增强反常霍尔效应的影响机制，实现对反常霍尔效应的调控，探究显著提高非均匀体系反常霍尔系数和灵敏度的有效途径，为反常霍尔效应的广泛应用提供实验和理论依据。

The enhanced anomalous Hall effect (AHE) observed in some heterogeneous magnetic metallic materials, such as granular films and multilayers, has attracted intense research interest owing to its great potential applications. However, compared with semiconductors, the anomalous Hall coefficient of them is smaller, which hinders their wide applications. Therefore, an innovative research ranging from the development of new system, preparation methods and enhancement mechanism to modulation mechanism is of urgent need. In this project, we plan to fabricate Co and Ni single metal nanocluster-assembled films, and Fe-Ni and Co-Pt alloy nanocluster-assembled films by the plasma-gas-condensation (PGC) type nanocluster beam deposition system designed by ourself, and further to study the relations between the AHE and interface features, nanocluster size, size uniformity, disorder degree and surface modification of nanoclusters. Significantly different from the traditional granular films, in our nanocluster-assembled films, the nanocluster size, compositon of alloy, disorder degree and surface modification of clusters can be independently controlled. On that basis, we expect to make it clear on the different contribution to the AHE in the granular films, to clarify the exact mechanism of the enhanced AHE, to achieve the adjustment of AHE, and to explore the effective method to improve the anomalous Hall coefficient and sensitivity. This project will provide experimental and theoretical foundation for the development and wide applications of AHE.