Investigation on the Graphitization Process of Amorphous Carbon for HAMR by Molecular Dynamics Simulation
作者： Qingkang Liu , Longqiu Li , Hongtao Zhang , Qitao Huang , Guangyu Zhang
DOI: 10.1109/TMAG.2016.2626344
关键词:
摘要: Molecular dynamics simulations are performed to investigate the laser-induced graphitization of amorphous carbon (a-C) films at different densities for heat-assisted magnetic recording. Physical insights into caused by laser heating provided analyzing virial pressure, bond angle distribution, radial distribution function, pair and atomic strains during cooling process. The effects density irradiation times on a-C investigated. ultrafast nonthermal phase transformation occurs in sp3–sp2 is mainly contributed atoms sp3–sp3 bonds both Less energy required those overcome barrier. shear volume can accelerate transformation. For all densities, rate sp2-hybridized increases rapidly first
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