Method to improve high-frequency magnetic characteristics of Fe80Ni20–O alloy films by introducing low-dose oxygen

[Fe80Ni20–O/SiO2]n Multilayer thin films for applications in GHz range

“…1(b)) also clearly shows that the dimension of Fe 80 Ni 20 -O nanocrystal is about the same as the thickness of Fe 80 Ni 20 -O monolayer. The selected area electron diffraction (SAED) pattern indicates that Fe 80 Ni 20 layers have a bcc phase, and it also reveals that adding The detail about the effect of the introduction of very low dose of oxygen on the microstructure of single layer Fe 80 Ni 20 -O alloy films was described elsewhere [17]. Besides, a representative cross-sectional high-angle annular dark-field (HAADF) image of this sample is shown in Fig.…”

High-frequency Magnetic Properties of [Fe80Ni20-O/SiO2]n Multilayer Film Served as Magnetic Core of Solenoid Inductor

“…The oblique incidence can push the grain growth along normal direction of the substrate and induce IPUMA of the films. The coercivity of easy axis and hard axis were 5.1 Oe and 2.9 Oe, respectively, which were much lower than those of the Fe 80 Ni 20 -O single layer thin film [14]. The low coercivity was ascribed to the grain refinement in Fe 80 Ni 20 -O magnetic layer.…”

“…The low coercivity was ascribed to the grain refinement in Fe 80 Ni 20 -O magnetic layer. Due to the introduction of the nonmagnetic SiO 2 layers, the saturation magnetization of the multilayer film decreased with certain degree, which was measured to be 0.85 T. But the resistivity of the magnetic core was up to 156.6 μΩ· cm, which has been greatly improved compared to that of Fe 80 Ni 20 alloy film (40 μΩ· cm) and Fe 80 Ni 20 -O soft magnetic monolayer film (90.7μΩ· cm) [14]. The impact of the magnetic core on the inductance and quality factor of the solenoid inductors is displayed in Figure 5 (a) and (b).…”

Electromagnetic and microwave properties of NiFe/NiFeO multilayer thin films

“…The data confirmed that the NiFeO film is not magnetic. However, Geng et al [20] fabricated a Fe 80 Ni 20 O film by introducing low-dose oxygen (the oxygen flow ratio varied from 0.75 to 3 %) and demonstrated that the oxygen flow ratio severely affects the magnetic performance of this type of film. Thus, as the oxygen flow rate increased up to a certain level, the film did not display any magnetic behavior.…”