Frequency-dependent complex permeability in rare earth-substituted cobalt/nonmagnetic transition metal soft ferromagnetic amorphous thin films

Abstract

Frequency and field dependence of magnetoelectric interactions in layered ferromagnetic transition metalpiezoelectric lead zirconate titanate Appl. Phys. Lett. 87, 222507 (2005); 10.1063/1.2137450 Fluctuation field and time dependence of magnetization in TbFeCo amorphous rare earth-transition metal thin films for perpendicular magnetic recording A study of complex permeability in rare earthsubstituted cobalt/nonmagnetic transition metal amorphous thin films J. Appl. Phys. 73, 5592 (1993); 10.1063/1.353661 Microstructure and magnetism in amorphous rare earth-transition metal thin films

Good High-Frequency and Soft Magnetic Properties of (Ni75Fe25) x (ZnO)1−x Nano-Granular Films with Wide Metal Volume Fraction (x) Range

“…It can be seen that in a wide x range, good high-frequency properties are obtained for (Ni 75 Fe 25 ) x (ZnO) 1−x films, suggesting that excellent high-frequency properties may be realized in other MSCGF systems, such as FeCo-SnO 2 , etc. For the typical sample with x = 0.74, it is seen that the μ is more than 200 below 1.0 GHz, while the imaginary part μ is much smaller than μ when f < 1.0 GHz and gradually increases to a maximum at f = 1.32 GHz which can be ascribed to the ferromagnetic resonance FMR [15] The experimental curves were fitted with formulas (2)-(4) quite well as shown by the solid lines. For the sample with x = 0.74, 4πM s = 7900 Gs and H k = 26 Oe, according to formula (4), the FMR frequency f r is approximately 1.30 GHz, consistent with the experiment result.…”

Thickness dependence of magnetic properties in (Fe)0.73(Sm2O3)0.27 nano-granular films

“…It is seen from Fig. 5 (a) that for this film is more than 140 below 1.5 GHz, then gradually decreases with frequency, while the imaginary part gradually increases to a maximum at f = 2.6 GHz, which can be ascribed to the ferromagnetic resonance (FMR) [11]. The measured curves ∼ f data were fitted well with the solution of Landau-Lifshitz equations taking account of the coherent spin procession [12,13], as shown by the solid lines in Fig.…”

Tb doped CoNbZr soft magnetic films with high anisotropy field for applications in GHz frequency region

“…The other researchers showed that the magnetization dynamics of soft ferromagnetic Ni 81 Fe 19 thin films at frequencies above 1 GHz can be tuned using rare-earth dopant while retaining the important soft magnetic properties [8,9]. Moreover, an appreciable increase of damping factors was reported due to rare-earth elements addition in the publications [7][8][9].…”

“…On the other hand, Russat Ideally such doping increases the frequency response without affecting the soft magnetic properties of the films [7]. The other researchers showed that the magnetization dynamics of soft ferromagnetic Ni 81 Fe 19 thin films at frequencies above 1 GHz can be tuned using rare-earth dopant while retaining the important soft magnetic properties [8,9].…”