NANOSYSTEMS: PHYSICS, CHEMISTRY, MATHEMATICS, 2017, 8 (6), P. 804–808
Role of carbon in the formation of the structure and magnetic properties of Ni@CNx nanoclusters under reactive magnetron deposition
R.V. Shalayev – Donetsk Institute for Physics and Engineering named after A. A. Galkin, R. Luxembourg str. 72, 83114, Donetsk, Ukraine; sharos@donfti.ru
V.N. Varyukhin – Donetsk Institute for Physics and Engineering named after A. A. Galkin, R. Luxembourg str. 72, 83114, Donetsk, Ukraine
A.M. Prudnikov – Donetsk Institute for Physics and Engineering named after A. A. Galkin, R. Luxembourg str. 72, 83114, Donetsk, Ukraine
A.I. Linnik – Donetsk Institute for Physics and Engineering named after A. A. Galkin, R. Luxembourg str. 72, 83114, Donetsk, Ukraine
V.V. Syrotkin – Donetsk Institute for Physics and Engineering named after A. A. Galkin, R. Luxembourg str. 72, 83114, Donetsk, Ukraine
Nanostructured hybrid Ni–CNx films were grown by magnetron sputtering of a composite graphite-nickel target. Atomic force microscopy showed the clustered nature of the films deposition on the substrate surface: a relatively high pressure in the low-temperature magnetron plasma made it possible to form the Ni@CNx nanoclusters type “core-shell”, where metallic nickel is the core and carbon nitride is the shell. When studying the role of carbon in the formation of the structure and properties of Ni@CNx nanoclusters, it was established that the saturation magnetization 4 πMs of nanoclusters drops sharply with a carbon content above 30 at.%. The reason is the formation of an increasingly saturated solid solution of carbon in nickel. At a carbon concentrations above 38 at.%, amorphous Ni–CNx nanoclusters are formed in the magnetron plasma, which are deposited on the substrate. An increase in the substrate temperature leads to the crystallization of Ni atoms, and the C and N atoms are forced out onto the surface of the nickel core, forming an array of Ni@CNx elements.
Keywords: carbon nitride, nanoclusters, magnetron sputtering.
DOI 10.17586/2220-8054-2017-8-6-804-808
