Influence of Pt thickness on magnetization reversal processes in (Pt/Co)₃ multilayers with perpendicular anisotropy

详细信息	查看全文 | 推荐本文 |

• 作者：R. Belhi^a ; ^{Rachid.Belhi@fst.rnu.tn} ; A. Adanlé ; té ; Adjanoh^a ; J. Vogel^b
• 关键词：Magnetization relaxation ; Domain wall propagation ; Nucleation
• 刊名：Journal of Magnetism and Magnetic Materials
• 出版年：2012
• 期刊代码：31_03048853
• 类别：ph
• 出版时间：June, 2012
• 卷：324
• 期：11
• 页码：1869-1877
• 文件大小：880 K

摘要

We present a detailed study of the magnetization reversal in perpendicularly magnetized (Pt/Co)₃ multilayers with different values of the platinum interlayer thickness t_Pt. To study the magnetization reversal in our samples we combined measurements of relaxation curves with the direct visualization of domain structures. Magnetization reversal was dominated by domain wall propagation for t_Pt=1 nm and by domain nucleation for t_Pt=0.2 nm, while a mixed process was observed for t_Pt=0.8 nm. We interpret our results within the framework of a model of thermally activated reversal where a distribution of activation energy barriers is taken into account. The reversal process was correlated with the energy barrier distribution.