Fe原子在Al基底上的扩散及薄膜生长条件对磁特性的影响

Diffusion of Fe Atoms on Al Substrate and Effect of Film Growth Conditions on the Magnetic Properties

摘要: 利用蒙特卡罗方法模拟Fe原子在Al基底上的沉积、扩散，以及Fe的团簇形貌的生长演化。研究了薄膜生长条件对Fe薄膜的分形形貌及磁特性的影响。模拟结果表明，随着温度的升高，Fe微观形貌经历了一个从分散成长、分形成长到凝聚成长的变化过程；而Fe薄膜的形貌极大地影响薄膜的磁特性，具有更紧凑的分形形貌的Fe薄膜具有更高的居里温度。

Abstract: A Monte Carlo technique has been developed for simulating the deposition and diffusion of Fe atoms on Al (100) surfaces, and the growth of Fe clusters. The effects of growth conditions on the Fe fractal morphology and the magnetic properties are investigated. The simulated results indicate that with increasing temperature of substrate, the surface morphology evolves from dispersed growth, fractal growth to dense growth, and finally to another dispersed growth. It is also found that the morphology of Fe film greatly affects the magnetic properties, and ramified atomic aggregate with a more compact morphology has a higher Curie temperature.