Effects of MgO barrier thickness on magnetic anisotropy energy constant in perpendicular magnetic tunnel junctions of (Co/Pd)n/MgO/(Co/Pt) n

被引：8

作者：

Taiwan SPIN Research Center, National Yunlin University of Science and Technology, Douliou, Yunlin 64002, Taiwan ^{[1
]}

不详 ^{[2
]}

不详 ^{[3
]}

机构：

来源：

IEEE Trans Magn | 2008年 / 11 PART 2卷 / 2558-2561期

关键词：

Tunnel junctions - Magnetic multilayers - Magnetic anisotropy - Hall effect - Kurchatovium - Palladium compounds - Platinum compounds - Magnetic devices;

D O I：

10.1109/TMAG.2008.2002594

中图分类号：

学科分类号：

摘要：

In this study, we report experimental results on perpendicular magnetic tunnel junctions composed of the binary multilayer Co/Pt and Co/Pd with various MgO barrier thicknesses. The coercivities of both Co/Pt and Co/Pd layers varied substantially with the MgO thickness. Very interestingly, the perpendicular anisotropy constant Ku of the Co/Pt multilayer measured by the extraordinary Hall effect oscillated with the MgO thickness, and the period of this oscillation was about 0.3 nm. Furthermore, both the Ku value and the oscillation amplitude decreased after annealing at 150°C and 200 °C, which suggest that the oscillation may result from the film morphology. © 2008 IEEE.

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