The Thickness-Dependent In-Plane Uniaxial Magnetic Anisotropy in Amorphous CoFeB Films on GaAs(001) Substrates.
- Resource Type
- Article
- Authors
- Tu, Hongqing; You, Biao; Gao, Yuan; Wang, Ji; Ruan, Xuezhong; Du, Jun
- Source
- Journal of Superconductivity & Novel Magnetism. Nov2016, Vol. 29 Issue 11, p2843-2848. 6p.
- Subject
- *AMORPHOUS carbon
*AMORPHOUS substances
*MAGNETIC anisotropy
*MAGNETIZATION reversal
*TUNNEL magnetoresistance
- Language
- ISSN
- 1557-1939
In-plane uniaxial magnetic anisotropy (UMA) has been studied on a series of amorphous Co Fe B (CoFeB) films deposited on GaAs(001) substrates. With the increasing of the CoFeB thickness from 3.5 to 20.0 nm, it was found that a large uniaxial anisotropy field ( H ) of about 270 Oe decreases monotonically to a relatively small value of about 100 Oe. The thickness dependence of H coincides with the common interface-induced UMA model. The magnetization reversal processes of this series of CoFeB films were also investigated. The evolution of the thickness-dependent magnetization reversal mechanisms was briefly discussed in terms of the Stoner-Wohlfarth model, the pinning of domain wall model, and the modified Kondorsky model. [ABSTRACT FROM AUTHOR]