Fine Structures Of The Fe--Based Metal Film Covering Synthetic Diamond Single Crystal
人造金刚石单晶铁基金属包膜的精细结构

Scanning Auger microprobe (Auger) and X-ray photoelectron spectroscopy (XPS) have been used to investigate the fine structures of the Fe-Ni-C film covering as-grown diamond single crystal synthesized at high temperature and high pressure (HPHT). It is shown that the fine structures of iron and carbon atoms have greatly been transformed only in the inner part of the film adjacent to diamond; the binding energies in the valence bands of iron and nickel atoms on the film contacting diamond obviously increase compared to those in other regions of the film. Hereby, the inner part and diamond/film interface play an important role in the diamond growth under HPHT. It is suggested that the catalysis of iron and nickel to carbon should be finished on the interface or in the inner part of the film.