Marked Enhancement of Roll-Off Frequency in FeCoN Synthetic Antiferromagnetic Films Deposited by Oblique Incidence

Luran Zhang; Dandan Gao; Huan Liu; Jiyang Xie; Wanbiao Hu

doi:10.3390/ma12142328

Marked Enhancement of Roll-Off Frequency in FeCoN Synthetic Antiferromagnetic Films Deposited by Oblique Incidence

Materials (Basel). 2019 Jul 22;12(14):2328. doi: 10.3390/ma12142328.

Authors

Luran Zhang¹, Dandan Gao¹, Huan Liu¹, Jiyang Xie², Wanbiao Hu³

Affiliations

¹ School of Materials Science and Engineering, Yunnan University, Kunming 650091, China.
² School of Materials Science and Engineering, Yunnan University, Kunming 650091, China. xiejiyang@ynu.edu.cn.
³ School of Materials Science and Engineering, Yunnan University, Kunming 650091, China. huwanbiao@ynu.edu.cn.

Abstract

A series of FeCoN films were successfully deposited on glass substrates in a magnetron sputtering system. Using oblique incidence method and FeCoN/Ru/FeCoN synthetic antiferromagnetic (SAF) structure, two additional anisotropies energy were introduced: oblique incidence anisotropy and exchange anisotropy energy, which marked enhancement of the effective magnetic anisotropy (Hk). The increment of Hk results in a significant improvement in the roll-off frequency of these films. The roll-off frequency of FeCoN/Ru/FeCoN films with SAF structure can reach up to 8.6 GHz. A feasible approach to conveniently controlling Hk of soft magnetic thin films by using oblique deposition and SAF structure can further improve their properties for the potential applications in the high frequency region.

Keywords: high frequency properties; magnetic materials; synthetic antiferromagnetic; thin films.