Formation of a fullerite layer as a dielectric in a Josephson contact

The formation of stable C60 fullerite films on the substrate surface makes it possible to create multi-layer composite materials with unique mechanical, thermophysical and electrical properties, which opens up new prospects in such areas of industry as machine and instrument engineering. Using the method of computer experiment, the formation of a three-layer composite was investigated, in which the material of the first and third layers was iron, and the second layer was a C60 fullerite film. An iron crystal Fe(100) was used as a substrate, onto which molecules of fullerites C60 and iron atoms (Fe) were successively deposited. The temperature of the system was maintained stationary during the simulation: 300 K, 700 K, or 1150 K. Thus, the process of forming an iron-carbon-iron (Fe-C-Fe) composite material was modeled. The entire complex of the described tasks of the computer experiment was modeled using the molecular dynamic LAMMPS code and a multiparticle potential (MEAM is a modified submerged atom method). The study of the behavior of a fullerite film located on the surface of an iron substrate after the deposition - of iron atoms on the film made it possible to establish that the film retained its integrity, although the film structure became more amorphous, as evidenced by an increase in the dispersion of the characteristic size of C60 fullerites forming the film. The results obtained can find practical application in the formation of three- and multilayer composite materials, primarily based on iron and carbon materials. The main result of the study is that patterns have been established in the behavior of C60 fullerites forming the second layer of the composite material after deposition of iron (Fe) atoms on it.