Mikhailov, I. F.Starikov, V. V.Baturin, A. A.2020-01-202020-01-202016Mikhailov I. F. Structure of magnetron hydroxyapatite films with small stoichiometry deviation / I. F. Mikhailov, V. V. Starikov, A. A. Baturin // Functional Materials. – 2016. – Vol. 23, No. 3. – P. 394-397.https://repository.kpi.kharkov.ua/handle/KhPI-Press/43828Phase composition, coherence lengths and micro-strain level in hydroxyapatite films with controlled deviation from stoichiometry (Ca/P = 1.67) were measured by methods of X-ray diffraction and X-ray fluorescent analysis. It was established that at Ca/P = 1.6±0.03, hydroxyapatite layers with thickness 2m on the niobium substrates were practically single-phase but differed by the coherence lengths and micro-strain levels for different crystallographic directions: the coherence length along was commensurable with the film thickness and much exceeded the values for and directions. The micro-strain level ε for direction reached (1.3÷1.7)·10-3 being by an order higher than for and directions. That testifies constrained growth conditions along with the high homogeneity of the lattice period of the hydroxyapatite film.enhydroxyapatite coatingchemical compositionphase compositionsubstructuremicro-strainArticledoi.org/10.15407/fm23.03.394