Structural and magnetic properties of Co–N thin films synthesized by direct current magnetron sputtering

Predicted stability, structures, and magnetism of 3d transition metal nitrides: the M4N phases

“…powder by nitridization of the metals, [1][2][3][4][5][6][7][8][9][16][17][18] as thin-lms by sputtering techniques 3,4,19 and as nanoparticles on substrates by molecular beam epitaxy techniques. 20 In general, it is difficult to obtain pure samples with high homogeneity using these methods.…”

Influence of the substrate on structure and magnetic properties of Co–N thin films

“…Theoretical calculations indicate that Co 4 N has high spin polarization ratio 0.88 [16], and is suitable for integration in spintronic devices. Magnetic cobalt nitrides thin films have been produced, generally using sputtering techniques [2,3,9,[13][14][15][17][18][19][20], with compositions directly related with the partial pressure (PP) of N 2 in the Ar+N 2 atmosphere used during deposition. Although a relatively large literature exists concerning the preparation, structural and magnetic characterization of Co-N films, systematic studies aimed to study the influence of the substrate on the film orientation and magnetic behavior are still lacking.…”

The structure and microwave permeability of thin cobalt films

“…It may be assumed that the difference between the values of f res for the "in" and "out" twists will diminish under the permeability measurement in the state of saturation (since λ Co < 0). Let us compare the value of the Helm holtz energy for the films with V d = 4.2 and 7.1 nm/min: (9) Since the difference [(F init ) 7.1 -(F init ) 4.2 ] is negative, the total thermodynamic potential of the Co films decreases with an increase in the deposition rate of the metal. It seems that the diminishment of the internal effective field and the free energy of the film is con nected with the diminishment of the area of the sepa rating boundaries Co cryst -Co amorph , the decrease in the volume of the amorphous metal, and the magnetic moments movement in the film plane.…”

“…The increase in H c also resulted from the increase in the thickness [2] and the creation of mechanical stresses in Co film [7]. An inverse effect is achieved by the injection of nitrogen [9] and fullerene [8]. The increase in the roughness degree of the sub strate [10] and the appearance of crystallographic tex ture [11,12] lead to the emergence of perpendicular anisotropy in the films.…”