Magnetocrystalline origin of the perpendicular magnetic anisotropy in Ga-poor FeGa thin films

Magnetoelasticity of Fe1−xGax thin films on amorphous substrates

“…Composition values measured in the samples were consistently lower than the nominal composition of the targets. This Ga loss during the growth process has been previously reported [29,34,35] and was attributed to the growth kinetics [29,36]. The composition (x Film Fe , x Film Ga ) and thickness values of the samples are also summarized in Table I.…”

“…The hard axis is along the [010] Si direction, and it is characterized by a lower remanent magnetization and a smaller coercive field. It is interesting to note that, although the native Si oxide is amorphous, the anisotropy Fe-Ga axis aligns along one of the 100 crystallographic Si axes; this behavior was already observed for us in previous studies [29,35]. Finally, we have observed that the samples become more isotropic when we increase the sample temperature during the growth process, which is reflected by the fact that M r /M s and μ 0 H c do not present significant variations along the different in-plane directions, as shown in Fig.…”

Microstructural contribution to the magnetic anisotropy in Fe 1 − x <

“…The composition values measured in the samples were consistently lower than the nominal composition of the targets. This loss of Ga during the growth process was previously reported [25,31,35] and attributed to growth kinetics [25,39]. For sputtered alloys, two possible mechanisms are proposed to explain the loss of Ga.…”

“…An in-plane uniaxial anisotropy is usually induced during deposition process and can be controlled by oblique deposition [29,30]. Furthermore, a uniaxial anisotropy perpendicular to the film can be induced as a result of interfacial effects or residual stresses [31]. The competition among magnetic anisotropies takes an important role in the magnetic commutation processes of films [32].…”