Getting of MgO base nanosize materials by ionic bombardment method

In last years interest to purposeful change of materials surface properties - in particular dielectric properties by ionic bombardment method - are sharply increasing. This most of all is related with production of nano-size structures with given physical properties which have perspectives in creation of new solid electronic devices. In case of MgO similar studies have a special interest because MgO is one of thermonuclear reactors first wall component. Bombardment has been carried out by Ar+ and Ba+ ions with energy variation E0 from 0.5 to 5 keV and irradiation dose D=1014-1017 cm-2. Change of composition, structure and properties were studied by application of secondary and photoelectron spectroscopy methods and fast electrons diffraction. Ionic bombardment, temperature and laser processing and all measurements in the same device in condition of superhigh vacuum (P=10-4 Pa). Experimental results show that ionic bombardment leads to considerable change of surface properties. Principal changes of MgO surface have been taken place under bombardment by Ar+ ions starting from dose D=5·1014 cm-2. At that on the surface separate regions enriched by Mg atoms which forming bonds of Mg-Mg type are appearing, and oxygen atoms in molecules form from these regions are practically fully dispersing