首页|(162900)Effects of temperature gradients on magnetic anisotropy of SmCo based films
(162900)Effects of temperature gradients on magnetic anisotropy of SmCo based films
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
NSTL
Elsevier
The magnetic anisotropy of SmCo-based permanent magnetic thin films are generally controlled by introducing buffer layer or heating substrate. However, the design for the multi-layer thin film system is complicated and the thickness of SmCo is limited due to a short range of interfacial stress/strain between the buffer layer and SmCo layer. In this work, the effects of temperature gradients, generated by RTP (rapid thermal process), on the magnetic anisotropy of the SmCo-based films were systematically investigated. The results show that the as-deposited films exhibit amorphous state. The out-of-plane coercivity of RTP-treated films is strongly correlated with the heating rate, and its optimum value (2810 Oe) is larger than that of the CTA (conventional thermal annealing) treated films (1670 Oe). For the RTP-treated films, the intensity of characteristic diffraction peaks for in-plane oriented SmCo_5 (200) and Sm_2Co_(17) (300) decreases, together with reducing the roughness. Besides, the grain size is finer and the contrast of magnetic domains becomes stronger for the RTP-treated films due to that the easy axis of SmCo_5/Sm_2Co_(17)phase gradually changes from in-plane to out-of-plane direction. It is suggested that the RTP treatment with a shorter annealing time has beneficial effects on obtaining finer microstructure and improving the out-of-plane magnetic anisotropy of the SmCo-based films. This work provides a novel way to control the magnetic anisotropy via annealing temperature gradients for permanent magnetic thin films, compared with conventional methods, to induce the magnetic anisotropy.
SmCo based filmsTemperature gradientsMagnetic anisotropy
Y.S. Gong、L Wei、Y.W. Zhang
展开 >
School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, PR China
NSTL
Elsevier
