La-doped Copper Nitride Films Prepared by Reactive Magnetron Sputtering

Copper nitride film (Cu3N) and La-doped copper nitride films (LaxCu3N) were prepared on glass substrates by reactive magnetron sputtering of a pure Cu and a pure La targets under N2 atmosphere. The results show that La-free film was composed of Cu3N crystallites with anti-ReO3 structure with (111) texture. The formation of the LaxCu3N films is affected strongly by La, and the peak intensity of the preferred crystalline 111]-orientation decreases with increasing the concentration of La. High concentration of La may prevent the formation of the Cu3N from crystallization. Compared with the Cu3N films, the resistivity of the LaxCu3N films have been decreased.