1. Static and high frequency magnetic properties of FeGa thin films deposited on convex flexible substrates.
- Author
-
Ying Yu, Qingfeng Zhan, Jinwu Wei, Jianbo Wang, Guohong Dai, Zhenghu Zuo, Xiaoshan Zhang, Yiwei Liu, Huali Yang, Yao Zhang, Shuhong Xie, Baomin Wang, and Run-Wei Li
- Subjects
IRON alloys ,MAGNETOSTRICTION ,THIN films ,MAGNETIC properties of metals ,MAGNETIC anisotropy ,POLYETHYLENE terephthalate - Abstract
Magnetostrictive FeGa thin films were deposited on the bowed flexible polyethylene terephthalate (PET) substrates, which were fixed on the convex mold. A compressive stress was induced in FeGa films when the PET substrates were shaped from convex to flat. Due to the effect of magnetostriction, FeGa films exhibit an obvious in-plane uniaxial magnetic anisotropy which could be enhanced by increasing the applied pre-strains on the substrates during growth. Consequently, the ferromagnetic resonance frequency of the films was significantly increased, but the corresponding initial permeability was decreased. Moreover, the films with pre-strains less than 0.78% exhibit a working bandwidth of microwave absorption about 2GHz. Our investigations demonstrated a convenient method via the prestrained substrates to tune the high frequency properties of magnetic thin films which could be applied in flexible microwave devices. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF