Title :
High Frequency Characteristics of Synthetic Antiferromagnetic Coupling FeCoN Sandwich Films
Author :
Luran Zhang ; Wenhui Zhang ; Xi Liu ; Ying Wang ; Jianmin Bai ; Dan Wei ; Fulin Wei
Author_Institution :
Key Lab. for Magn. & Magn. Mater. of the Minist. of Educ., Lanzhou Univ., Lanzhou, China
Abstract :
The soft magnetic FeCoN thin films and FeCoN/Ru/FeCoN sandwich-structured films were prepared by using DC magnetron sputtering system. The high frequency characteristics of the FeCoN films with FM/AFM/FM sandwich structures had been investigated. The effective magnetic anisotropy field (Hk) of FeCoN sandwich films can be changed by adjusting the film structures, such as the thickness of the FM and AFM layers, and the roughness of the interface. Therefore, the ferromagnetic resonance frequency (fr) of the FeCoN sandwich films can be tuned over a very wide range. The single-layer FeCoN films show a highest roll-off frequency of about 2.7 GHz, but that of the FeCoN sandwich films can be tuned over a very wide range from 3 GHz to beyond 8 GHz.
Keywords :
antiferromagnetic materials; ferromagnetic materials; ferromagnetic resonance; high-frequency effects; iron compounds; magnetic anisotropy; magnetic multilayers; magnetic thin films; metal-insulator boundaries; ruthenium; soft magnetic materials; sputter deposition; DC magnetron sputtering; FeCoN; FeCoN-Ru-FeCoN; ferromagnetic resonance frequency; high frequency characteristics; interface roughness; magnetic anisotropy field; single-layer films; soft magnetic sandwich-structured films; soft magnetic thin films; synthetic antiferromagnetic coupling sandwich films; Anisotropic magnetoresistance; Frequency modulation; Magnetic anisotropy; Magnetic hysteresis; Saturation magnetization; Soft magnetic materials; Sputtering; Antiferromagnetic materials; cutoff frequency; magnetic anisotropy;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2011.2153184
