“…Matenoglou et al [21] reported that the ternary transition metal nitrides Ta x Me 1−x N (Me = Ti, Zr, Hf, Nb, Ta, Mo, W) formed solid solutions over the entire x range (0 < x < 1) and that they were stable in the rock-salt structure regardless of the valence electron configuration of its constituent metals. Ta ), which was attributed to the re-sputtering of N atoms from the surface resulting from the increasing energy of bombarding ions [23,24]. Ta2N (ICDD 26-0985), and cubic ZrN phases, which is attributable to the severe lack of N content in the thin films.…”