Using different experimental techniques we analyze the interplay between the structure and the magnetomechanical behavior of soft nanogranular CoFeAlO films with thickness ranging from 125 to 550 nm. The sputtered film is characterized by 40-nm FeCo grains and a saturation magnetization of 16 kG. The results show that, due to the role of the mechanically stiff and insulating Al-O matrix, an increase of the resistivity leads to an increase of the anisotropy field and also of the ferromagnetic resonance frequency. The 125-nm -thick films possess the best combination of anisotropy field and resistivity leading to an estimated ferromagnetic resonance frequency around 1.9 GHz.
ASJC Scopus subject areas
- Physics and Astronomy(all)