Induction of large in-plane uniaxial magnetic anisotropy for Co–Fe–B–Pt thin films by magnetic field annealing
Abstract
We report the induction of large in-plane uniaxial magnetic anisotropy for the CoFeB-based thin films by post-annealing under the magnetic field application. The comprehensive study reveals the influence of CoFeB composition and Pt addition to CoFeB on the induced magnetic anisotropy by magnetic field annealing. The addition of Pt to a CoFeB film significantly enhances the effect of magnetic field annealing, and as a result, the CoFeB–Pt films exhibit the in-plane uniaxial magnetic anisotropy energies that are one order of magnitude larger than the pristine CoFeB films. In order to understand the mechanism of magnetic anisotropy induction by post-annealing, we carried out the magnetostriction measurement for the CoFeB-based thin films. The correlation between the induced magnetic anisotropy and magnetoelastic properties is discussed.
Article Details
Journal Info
Journal of Applied Physics
American Institute of Physics
Authors (7)
Takumi Yamazaki
Institute for Materials Research, Tohoku University 1 , Sendai 980-8577,
Yugo Ishitani
Advanced Products Development Center, Technology and Intellectual Property HQ, TDK Corporation 2 , Ichikawa 272-8558,
Katsuyuki Nakada
Advanced Products Development Center, Technology and Intellectual Property HQ, TDK Corporation 2 , Ichikawa 272-8558,
Tomoyuki Sasaki
Advanced Products Development Center, Technology and Intellectual Property HQ, TDK Corporation 2 , Ichikawa 272-8558,
Yasushi Endo
Department of Electrical Engineering, Graduate School of Engineering, Tohoku University 3 , Sendai 980-8579,
Koki Takanashi
Institute for Materials Research, Tohoku University 3 , Sendai 980-8577,
Takeshi Seki