The Role of Magnetoelastic Field Related to Underlayers on Magnetic Properties of FeCo Thin Films

Author

Xie, Hailong ; Zhang, Kaiming ; Li, Hongjia ; Wang, Yi ; Li, Zhenghua ; Wang, Ying ; Cao, Jiangwei ; Bai, Jianmin ; Wei, Fulin ; Wei, Dan

Author_Institution

Key Lab. for Magn. & Magn. Mater. of the Minist. of Educ., Lanzhou Univ., Lanzhou, China

Volume

48

Issue

11

fYear

2012

Firstpage

2917

Lastpage

2920

Abstract

In this work, the influence of the magnetoelastic field on the magnetic properties of FeCo thin film is analyzed by the micromagnetic model. Formula of magnetoelastic energy related to the stress between the FeCo and the underlayer are derived to analysis the role of stress on soft magnetic properties. The cubic anisotropy determines the symmetry of the loops. For the magnetoelastic field, the main term H_ma has significant influence on the easy-axis coercivity and the cross term H_mb affects the slope of the hard-axis loop. Good in-plane anisotropy of FeCo thin film, which can be obtained by using certain underlayers (such as Cu, NiFe, CoFe), is corresponding to low value of H_ma and H_mb. The magnetization 4πM_s at amorphous grain boundary has great effect on the properties of FeCo film.

Keywords

amorphous magnetic materials; cobalt alloys; coercive force; ferromagnetic materials; grain boundaries; iron alloys; magnetic anisotropy; magnetic thin films; magnetoelastic effects; micromagnetics; soft magnetic materials; stress analysis; FeCo; amorphous grain boundary; cubic anisotropy; easy-axis coercivity; ferromagnetic materials; hard-axis loop; in-plane anisotropy; magnetization; magnetoelastic energy; magnetoelastic field; micromagnetic model; soft magnetic properties; stress analysis; thin films; Amorphous magnetic materials; Magnetic properties; Magnetomechanical effects; Perpendicular magnetic anisotropy; Saturation magnetization; Soft magnetic materials; Magnetostriction; micromagnetic model; microstructure; underlayer;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2012.2198873

Filename

6332984