Films with nanocomposite structure αFe(N) +ZrN for soft magnetic applications

Magnetron-Deposited FeTiB Films: From Structural Metastability to the Specific Magnetic State

“…The films 1.0 µm (Fe 73 Ti 5 B 19 O 3 ) and 0.6 µm (Fe 55 Ti 16 B 27 O 2 ) thick were deposited on glass and metallic (Ni-Cr alloy) substrates for 10 min in an Ar atmosphere at a pressure of 0.2 Pa, at a cathode voltage of 500 V, and a current of 1.5 A. The films were annealed at 500 • C for 1 h (Fe 73 Ti 5 B 19 O 3 films) and 1, 5, and 9 h (Fe 55 Ti 16 B 27 O 2 films) in a vacuum of 2•10 −4 Pa. For this class of film materials, an annealing temperature equal to 500 • C ensures the lowest values of the coercive field [7].…”

“…Earlier, by an example of soft magnetic bulk alloys prepared by casting, we showed that the two-phase Fe+Me IV X state ensuring the high level of functional characteristics can be formed in alloys, the phase state of which is described by equilibrium quasi-binary Fe-Me IV X phase diagrams with eutectic solidification [5]. The development of the approach for soft magnetic film alloys [6][7][8][9] prepared under conditions of rapid solidification from vapor (magnetron deposition) should assume the formation of a metastable phase structural state caused by (i) the formation of an amorphous phase, (ii) the shift of eutectic composition toward the more refractory constituent MeX, (iii) changing the concentration range of existence of the two-phase Fe+MeX equilibrium in the ternary Fe-Me-X system [10,11], and a number of other factors. The adequate qualitative and quantitative estimations of the formed metastable state and its "shift" toward the equilibrium in the course of subsequent annealing are the important stage of the investigations aimed at finding the preparation conditions of two-phase Fe+Me IV X film material ensuring the required level of properties.…”