Effect of lanthanum manganite particles on the structure and magnetic behavior of PEO coatings on titanium

"La + Mn-containing TiO2-layer/Ti" composites were formed by plasma electrolytic oxidation in silicate electrolytes with dispersed particles of lanthanum manganite of different composition. The influence of solid-state synthesis temperature on phase composition and magnetic characteristics of lanthanum manganite powder has been studied. An increase in temperature from 870 to 1300 degrees & Scy; leads to an increase in the coercivity of the powders, which is associated with a change in particle stoichiometry and size. It has been established that the properties of the powder introduced into the electrolyte affect the features of plasma electrolytic formation (voltage-time responses, final voltage), thickness, morphology, and composition of coatings. The addition of powder synthesized at a higher temperature leads to a drop in the formation voltage and a halving of the thickness of the coatings, a greater incorporation of manganese and lanthanum into the composition of the coatings and pores, as well as pronounced ferromagnetism at 3 K. The preservation of magnetic properties over time (1 year) has been tested using the example of a PEO composite obtained in a silicate electrolyte with lanthanum manganite powder synthesized at 870 degrees C.