Tuning anomalous Hall effect in perpendicular multilayers with different oxygen environment by interfacial ionic migration
Tuning anomalous Hall effect in perpendicular multilayers with different oxygen environment by interfacial ionic migration
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DOI：
10.1016/j.apsusc.2016.12.012
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发表时间：
2017-02
影响因子：
6.7
通讯作者：
Jingyan Zhang;Q. Y. Sun;Yanyi Liu;W. Peng;Fangzhi Wang;Yue Pan;L. Ding;Guang-Hua Yu
中科院分区：
文献类型：
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作者：
Jingyan Zhang;Q. Y. Sun;Yanyi Liu;W. Peng;Fangzhi Wang;Yue Pan;L. Ding;Guang-Hua Yu
本文报道了在不同界面氧配位的垂直多层膜中，界面氧的迁移及其引起的反常霍尔效应。Pt/Co/MgO/Pt和Pt/Co/Al_2O_3/Pt多层膜的饱和霍尔电阻Ra_H分别为3.66 Ω和4.34 Ω。经400 °C退火后，薄膜的电阻抗拉强度分别达到4.82 Ω和6.67 Ω，比沉积态分别提高了32%和54%。特别是Pt/Co/Al 2 O3/Pt多层膜的Δ RAH增量值比Pt/Co/MgO/Pt膜的Δ RAH增量值大101%。界面结构分析表明，两种样品的Δ RAH差异源于不同的界面氧配位导致的不同的氧迁移行为。
Interfacial oxygen migration and its induced anomalous Hall effect are reported in perpendicular multilayers with different interfacial oxygen-coordinated. Saturation Hall resistanceRAHfor Pt/Co/MgO/Pt and Pt/Co/Al2O3/Pt multilayers is 3.66 Ω and 4.34 Ω in as-deposited state, respectively. After annealing at 400 °C,RAHvalue reaches 4.82 Ω and 6.67 Ω, which is 32% and 54% larger than that in as-deposited samples, respectively. Especially, the increment value ΔRAHin Pt/Co/Al2O3/Pt multilayers is 101% larger than that in Pt/Co/MgO/Pt film. Interfacial structural analysis shows such differentΔRAHin two samples originates from distinct oxygen migration behavior induced different interfacial oxygen-coordinated.