Simulations On The Growth Dynamics And Magnetic Properties Of 3D Transition Metal Ni And Its Alloy Thin Films

Recently, the nanostructured magnetic films have become interesting subject due to their extensive novel technological applications and theories, such as modern nanostructured technological devices and magnetic storage media. In this thesis,we perform Monte Carlo simulations to study the growth of thin Ni film on Ni(100) and the magnetic properties of Ni and its alloy films. The main contents are arranged as follows:1. The essential conception and physical characters of nanostructured magnetic films are introduced in brief. Following, we mostly present the basal theories and Monte Carlo method.2. Based on the Monte Carlo (MC) simulation, the film growth and magnetic properties of the Ni (100) system are investigated. It is found that:(1) The surface roughness r of the Ni films has closely related with the grow condition (the deposition rate v and the substrate temperature T). The surface roughness r decreases with decreasing deposition rate v and rising substrate temperature T. (2) the surface roughness r decreases with enhancing substrate temperature T until T goes up to a specific value, namely the super growth temperature.3. We also perform Monte Carlo simulation to study the magnetization M and Curie temperature Tc of Ni and its alloy films. The simulated results indicate that the size and surface roughness r influence evidently magnetization M and Curie temperature Tc due to the change of the coordination number Z. At the same time, it is found that the doped atoms have important role on the magnetic properties of Ni-based films.