INTERATOMIC INERACTIONS IN AMORPHOUS COMPOSITES (CoFeB)x(TiO2)1–x WITH DIFFERENT CONTENT OF METAL AND DIELECTRIC COMPONENT ACCORDING TO IR SPECTROSCOPY

Abstract

Purpose. By a method of ion-beam sputtering of two targets (one of the CoFeB alloy, the second of TiO2 on a rotating glass-substrate substrate, a series of samples were obtained with a gradient of the composition and thickness of the composite (Co40Fe40B20)x(TiO2)1-x on the diffraction
patterns of amorphous composites, a halo was found corresponding to the average interatomic distance close in magnitude to the interplanar spacing of the most intense diffraction lines in CoFe alloys.
Results. Using IR spectroscopy, the modes were identifi ed that correspond to interatomic bonds in amorphous composites (CoFeB)x (TiO2)1-x of various compositions. The presence of bonds with oxygen of all elements of the composite Fe – O, Co – O, Ti – O, B – O, as well as the formation of
intermediate chemical bonds Ti – O – B and Ti – O – Co between the atoms of the dielectric and metal components of the composite has been established.
Conclusions. Based on the data obtained, a model of amorphous composites (Co40Fe40B20)x(TiO2)1-x is proposed, in which metal particles are represented as a nucleus of metal CoFe clusters with a shell of d-metals oxides and borides/oxyborides distributed in a dielectric matrix of titanium dioxide TiO2-x.

SOURCE OF FINANCING
The work was supported by the Ministry of Education and Science of the Russian Federation as part of a state assignment to universities in the fi eld of scientifi c activity for 2017-2019. Projects No. 3.6263.2017 / WC and No. 16.8158.2017 / 8.9.

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