论文标题
COFEB/MGO/PT连接中的外部隧道大厅效应
Extrinsic tunnel Hall effect in CoFeB/MgO/Pt junctions
论文作者
论文摘要
研究电流流过COFEB/MGO/PT隧道连接处时发生的大厅效应。结果表明，PT电极中的横向电压在施加到隧道连接处的直流电压上是非线性的。它具有线性（奇数）和二次（偶数）部分。线性部分包含铁磁电极中异常霍尔效应的众所周知的贡献，铂等人的逆旋转效应。二次部分是由电子在外部电场中的自旋轨道散射引起的现象，该电场是由施加到屏障的电压引起的外部电场中引起的。该字段达到$ 10^9 $ v/m的值，接近内部原子场。随着PT电极厚度的增加，这两种效应的幅度都会降低，这是由于分流效应而增加。
The Hall effect that occurs when current flows through a CoFeB/MgO/Pt tunnel junction is investigated. It is shown that the transverse voltage in Pt electrode is nonlinear on a DC voltage applied to the tunnel junction. It has both linear (odd) and quadratic (even) parts. The linear part contains well-known contributions of the anomalous Hall effect in the ferromagnetic electrode, inverse spin-hall effect in platinum and others. The quadratic part is a phenomenon caused by the spin-orbit scattering of electrons in an external electric field induced by a voltage applied to the barrier. This field reaches values of $10^9$ V/m which is close to internal atomic fields. The magnitude of both effects decreases as thickness of Pt electrode is increased due to shunting effects.
