By Topic

Magnetic properties and high-frequency characteristics of FeCoAlO gradient composition thin films

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

The purchase and pricing options are temporarily unavailable. Please try again later.
8 Author(s)
Zheng, Fu ; Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000, China ; Luo, Feilong ; Lou, Yuanfu ; Wang, Ying
more authors

Your organization might have access to this article on the publisher's site. To check, click on this link: 

5 × 25 mm FeCoAlO gradient composition thin film was prepared with composite target by using RF magnetron sputtering. The Al-O composition gradient along the length direction of the film was introduced by Al2O3 chips asymmetrically arrayed on a Fe70Co30 target disk. The film was divided into five equal segments. All samples showed a low coercive force Hc of 4 – 8 Oe. The saturation magnetization 4πMs increased continuously from 17.3 kGs for sample 1 (has more Al-O content) to 19.7 kGs for sample 5 and it was consistent with the increasing of Fe-Co composition. Meanwhile, these samples showed different anisotropy behaviors relating with Al-O composition. The sample 1 exhibited the same magnetization curve along the directions of G and G (G and G are parallel and perpendicular to the direction of the Al-O composition gradient, respectively). In both of G & G directions, the sample 1 showed a resonance frequency (fr) of around 2.6 – 3.0 GHz, while, in G direction, it showed a high value of real permeability μ′. The sample 5 exhibited a distinct in-plane uniaxial anisotropy and a good high-frequency response of 3.0 GHz resonance frequency. So these films having gradient composition exhibit are suggested for the use in integrated magnetic devices working in the GHz frequency range.

Published in:

Journal of Applied Physics  (Volume:111 ,  Issue: 7 )