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

Volume

47

Issue

10

fYear

2011

Firstpage

3932

Lastpage

3934

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 (H_k) 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 (f_r) 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;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2011.2153184

Filename

6028211