2、Spin Orbit Torque (SOT):自旋轨道转矩 由于STT-MRAM还存在一些弊端,例如调控磁矩翻转的临界电流密度仍比较大,产生的功耗较高等。基于SOT的MRAM可以克服其一些缺点。 SOT的原理为利用spin Hall effect (SHE)或inverse spin galvanic effect (iSGE),使得在具有强自旋轨道耦合的重金属层中流动的电流转化为自旋流,...
其导致的反常速度\vec v_a使得在时间反演对称被破坏(如外加磁场)时电导率矩阵的反对角线元素不为零。(有关Berry曲率的内容可以参考我之前的文章专题:Berry Phase and Anomalous Hall Effect或者相关的教科书或文献) Rashba效应会引发的很多有趣的物理现象,如spin-orbit torque。其还在低维Dirac体系,拓扑绝缘体和Maj...
The spin-orbit torque (SOT) effective fields, namely field-like and damping-like terms, depend on the thicknesses of heavy metal (HM) and ferromagnetic metal (FM) layers, in a stack comprising of HM/FM/HM or oxide. In this work, we report on the dependence of the SOT effective fields...
great potential for next-generation computing applications. Here we report the observation of rich spin-orbit torque switching phenomena such as field-free switching, multistate switching, memristor behavior and ratchet effect in a single shot, co-sputtered, rare earth-transition metal GdxCo100−x....
Spin–orbit torque has recently been intensively investigated for the purposes of manipulating the magnetization in magnetic nano-devices and understanding fundamental physics. Therefore, the search for novel materials or material combinations that exhibit a strong enough spin-torque effect has become one ...
Spin-orbit precession effect in a Py/Pt/Co tri-layer structure detected by ferromagnetic resonance spintronicsspin currentspin-orbit torqueferromagnetic resonanceSpin-orbit torques (SOTs) acting in a Py/Pt/Co tri-layer, where the Py and Co layers are in-plane and perpendicularly magnetized, ...
However, in the absence of the spin Hall effect (SHE) in the capping layer, the torque decreases monotonically with the capping layer thickness. Conversely, the spin Hall torque is found to decrease monotonically with the FM layer thickness, irrespective of the presence or absence of the SHE ...
electrical control effectspin Hall anglespin–orbit torqueElectrical control of current-induced spin–orbit effects in magnets is supposed to reduce the power consumption in high-density memories to the utmost extent, but the efficient control in metallic magnets at a practical temperature remains ...
Detrimental effect of interfacial Dzyaloshinskii-Moriya interaction on perpendicular spin-transfer-torque magnetic random access memory Interfacial Dzyaloshinskii-Moriya interaction in ferromagnet/heavy metal bilayers is recently of considerable interest as it offers an efficient control of... PH Jang,K Song,...
3.2. Rashba effect 3.3. Emerging new mechanisms 3.4. Multidomain switching mechanisms 4. Spin-orbit torque in various material systems 4.1. Spin-orbit torque in heavy metal/ferromagnet system 4.1.1. Heavy metal/ferromagnet bilayers with perpendicular magnetic anisotropy ...