Large Spin-Orbit-Torque Efficiency and Room-Temperature Magnetization Switching in SrIrO3/ Co-Fe-B Heterostructures
Large Spin-Orbit-Torque Efficiency and Room-Temperature Magnetization Switching in SrIrO3/ Co-Fe-B Heterostructures
复制标题
SrIrO3/Co-Fe-B 异质结构中的大自旋轨道扭矩效率和室温磁化翻转
DOI：
10.1103/physrevapplied.19.024076
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发表时间：
2023
影响因子：
4.6
通讯作者：
Zheng, Xin Yu
中科院分区：
文献类型：
--
作者：
Li, Peng;Channa, Sanyum;Li, Xiang;Alahmed, Laith;Tang, Chunli;Yi, Di;Riddiford, Lauren;Wisser, Jacob;Balakrishnan, Purnima P.;Zheng, Xin Yu
自旋-轨道-力矩（SOT）开关是一种潜在的能量有效的机制，通过它电流可以控制磁化。我们展示了室温SOT开关在纳米厚的层，尽管CoFeB和接口的非晶性质。这种行为归因于大的自旋霍尔角以及界面处的高自旋传输，这有助于SOT效率。我们的双层膜具有高达1.4的大的自旋霍尔电导率（2 e）。在我们的双层膜中，我们观察到单向磁电阻和电流诱导磁化翻转，在室温下具有低的临界电流密度。我们的研究结果是有希望的异质结构相结合的技术相关的CoFeB高自旋轨道耦合氧化物。
Spin-orbit-torque (SOT) switching is a potentially energy-efficient mechanism by which electrical current can control magnetization. We demonstrate room-temperature SOT switching in nanometer-thickbilayers despite the amorphous nature of CoFeB and the interface. This behavior is attributed to the large spin Hall angle inas well as high spin transmission at the interface that contribute to the SOT efficiency. Our bilayers exhibit largeof up to 1.4 and effective spin Hall conductivity of(2e). In our bilayers, we observe unidirectional magnetoresistance and current-induced magnetization switching with a low critical current density ofat room temperature. Our results are promising for heterostructures combining technologically relevant CoFeB with high spin-orbit-coupling oxides.