Abstract

Compounds of rare-earth elements with elements of the sixth group of the chemical elements’ periodic table have an interesting electrophysical, optical and other properties [1,2], but their mechanical properties have not been studied. Recently, massive attention has been drawn to the mechanical properties of films since films with interesting electrical properties often exhibit low mechanical strength, which limits their practical application. The aim of the present work has been developing a technology for preparing thin ErSe crystal films on different substrates by vacuumthermal evaporation from two independent sources of erbium and selenium, and by the method of discrete vacuum-thermal evaporation, pre-synthesized ErSe compound and to study their relative mechanical strength using the full erasure method. ErSe films were deposited on a substrate rectangular parallelepiped glass-ceramic with dimensions of 8x15x1mm.Before the preparation of the films, the substrates were chemically cleaned in a mixture of nitric and hydrochloric acid and then washed with distilled water and heated in a vacuum at 650 K for 30 minutes. Experiments showed that films with good adhesion were formed on substrates treated in this way.