I.S. Zamulin - Ph.D. (Phys.-Math.), Senior Research Scientist, Khakas State University named after N.F. Katanova (Abakan) Е-mail: zamulin_ivan@mail.ru S.L. Gafner - Dr.Sc. (Phys.-Math.), Associate Professor, Khakas State University named after N.F. Katanova (Abakan) E-mail: sgafner@khsu.ru

Research were conducted using molecular dynamics. We studied the processes of formation of internal structure in nanoclusters of platinum, palladium and their alloy of different chemical composition. Considered structureless clusters obtained by fusion of the nanoparticles. Nanoparticles was then cooled at a rate typical for storage devices with phase change information. It was shown that the cooling condition of the liquid phase is possible to implement different internal structure and identified some criteria of their stability. It was shown that the material of the nanoclusters with a diameter of 3.5 nm of alloy Pd-Pt and a content of atoms of platinum of 10% may be used as elements platypodidae that the material of the nanoclusters with a diameter of 3.5 nm of alloy Pd-Pt and a content of atoms of platinum of 10% may be used as memory elements. Nanomaterial shows the amorphous and crystalline state at different cooling rates.

 

1. Wong H.-S.P., Raoux S., Kim S.B., et al. Phase change memory // Proceedings of the IEEE. 2010. V. 98. № 12 P. 2201-2227.
2. Golovin JU.I. Vvedenie v nanotekhniku. M.: Mashinostroenie. 2007. S. 496.
3. Cleri F., Rosato V. Tight-binding potentials for transition metals and alloys // Phys. Rev. B. 1993. № 48. P. 22-33.
4. Massen C., Mortimer-Jones T.V., Johnston R.L. Geometries and segregation properties of platinum-palladium nanoalloy clusters // J. Chem. Soc., Dalton Trans. 2002. V. 23. P. 4375-4388.
5. Nose S. A unified formulation of the constant temperature molecular dynamics methods // J. Phys. Chem. 1984. № 81. P. 511-519.
6. Pang T. An introduction to computational physics // Cambridge: University Press. 2006. P. 385.
7. Andersen H.C. Molecular dynamics simulations at constant pressure and/or temperature // J. Phys. Chem. 1980. V. 72. P. 2384-2393.
8. Gafner Yu.Ya., Gafner S.L., Redel L.V., Goloven-ko Zh.V. The estimation of possibility of using «order-disorder» transition phenomena in Ni, Cu and Au nanoclusters for advancing the efficiency of information recording processes. // Journal of Nanoscience and Nanotechnology. 2014. V. 14. № 7. R. 5138-5144.
9. Mottet C., Rossi G., Baletto F., Ferrando F. Single Impurity Effect on the Melting of Nanoclusters // Phys. Rev. Lett. 2005. V. 95. P. 035501 (1-4).