通过3d/5d电子的原子堆叠来剪裁磁序
Tailoring magnetic order via atomically stacking 3d/5d electrons
摘要：
为了实现高性能的自旋电子器件，需要调节磁有序（诸如磁各向异性和拓扑自旋织构）的能力。最近的策略是采用界面工程技术，如引入自旋相关的界面耦合，以定制磁序和实现新的磁性能。由于Mn（3d）/Ir（5d）氧化物通过3d和5d电子的纠缠而表现出丰富的磁性和强的自旋轨道耦合，我们选择了一种独特的极性-非极性LaMnO 3/SrIrO 3超晶格。通过磁化强度和磁输运的测量，我们发现随着超晶格周期的减小，磁序是界面主导的。然后，我们能够有效地修改的磁化强度，倾斜的铁磁易轴，和对称性转变的各向异性磁电阻的LaMnO 3/SrIrO 3超晶格通过引入额外的Mn（3d）和Ir（5d）接口。通过深入的第一性原理计算和数值模拟进一步研究发现，这些磁性行为可以通过3d/5d电子关联和Rashba自旋轨道耦合来理解。这里报道的结果展示了一种通过不同电子的原子堆叠来同步工程磁性能的新途径，有助于未来的应用。
英文摘要：
The ability to tune magnetic orders, such as magnetic anisotropy and topological spin texture, is desired in order to achieve high-performance spintronic devices. A recent strategy has been to employ interfacial engineering techniques, such as the introduction of spin-correlated interfacial coupling, to tailor magnetic orders and achieve novel magnetic properties. We chose a unique polar-nonpolar LaMnO3/SrIrO3 superlattice because Mn (3d)/Ir (5d) oxides exhibit rich magnetic behaviors and strong spin-orbit coupling through the entanglement of their 3d and 5d electrons. Through magnetization and magnetotransport measurements, we found that the magnetic order is interface-dominated as the superlattice period is decreased. We were able to then effectively modify the magnetization, tilt of the ferromagnetic easy axis, and symmetry transition of the anisotropic magnetoresistance of the LaMnO3/SrIrO3 superlattice by introducing additional Mn (3d) and Ir (5d) interfaces. Further investigations using in-depth first-principles calculations and numerical simulations revealed that these magnetic behaviors could be understood by the 3d/5d electron correlation and Rashba spin-orbit coupling. The results reported here demonstrate a new route to synchronously engineer magnetic properties through the atomic stacking of different electrons, contributing to future applications.
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