Şteţco Elena M, Petrişor Traian, Pop Ovidiu A, Belmeguenai Mohamed, Miron Ioan M, Gabor Mihai S
Centre for Superconductivity, Spintronics and Surface Science, Physics and Chemistry Department, Technical University of Cluj-Napoca, Str. Memorandumului, 400114 Cluj-Napoca, Romania.
Applied Electronics Department, Technical University of Cluj-Napoca, Str. Memorandumului, 400114 Cluj-Napoca, Romania.
Nano Lett. 2024 Nov 6;24(44):13991-13997. doi: 10.1021/acs.nanolett.4c03339. Epub 2024 Oct 27.
Research on current-induced domain wall (DW) motion in heavy metal/ferromagnet structures is crucial for advancing memory, logic, and computing devices. Here, we demonstrate that adjusting the angle between the DW conduit and the current direction provides an additional degree of control over the current-induced DW motion. A DW conduit with a 45° section relative to the current direction enables asymmetrical DW behavior: for one DW polarity, motion proceeds freely, while for the opposite polarity, motion is impeded or even blocked in the 45° zone, depending on the interfacial Dzyaloshinskii-Moriya interaction strength. This enables the device to function as a DW diode. Leveraging this velocity asymmetry, we designed a Y-shaped DW conduit with one input and two output branches at +45° and -45°, functioning as a DW selector. A DW injected into the junction exits through one branch, while a reverse polarity DW exits through the other, demonstrating selective DW routing.
研究重金属/铁磁体结构中电流诱导的磁畴壁（DW）运动对于推进存储器、逻辑和计算设备至关重要。在此，我们证明，调整DW导管与电流方向之间的角度可提供对电流诱导的DW运动的额外控制程度。相对于电流方向具有45°截面的DW导管会导致不对称的DW行为：对于一种DW极性，运动自由进行，而对于相反极性，根据界面Dzyaloshinskii-Moriya相互作用强度，运动在45°区域受到阻碍甚至被阻止。这使得该器件能够用作DW二极管。利用这种速度不对称性，我们设计了一种Y形DW导管，在+45°和-45°处有一个输入分支和两个输出分支，用作DW选择器。注入结中的DW通过一个分支输出，而相反极性的DW通过另一个分支输出，展示了选择性DW路由。
