Stable one-dimensional (1D) magnetic nanoribbons are superior to the two-dimensional (2D) or bulk materials due to the quantum size effect and edge effect as well as the controllable bandwidth. Through first-principles calculations, Wannier functions and Monte Carlo simulation, it is found that the GdX₂ (X = Cl, Br) zigzag nanoribbons (ZNRs) are dynamically stable, with Curie temperature of ferromagnetic ground state significantly higher than that of their 2D counterpart. The results show that inherent transverse dipole moment and perpendicular magnetocrystalline anisotropy energy (PMAE) induce the coexistence of Rashba effect and valley polarization in such 1D magnetic ZNRs. GdBr₂ ZNR with four zigzag chains (GdBr₂-4ZNR) has larger valley splitting and PMAE than that of GdCl₂-4ZNR, demonstrating room temperature ferromagnetic ground state. Through regulating the bandwidth of GdBr₂ ZNR, intrinsic anomalous valley Hall (AVH) effect is observed in GdBr₂-5ZNR. Importantly, Dirac-cone-like electronic states, PMAE and AVH effect are robust against the increment of nanoribbon bandwidth which is essential for utilization. These results provide important insights and pave an avenue for the potential application of magnetic nanoribbons in spin-dependent and valley-dependent miniature information storage devices.

由于量子尺寸效应和边缘效应以及可控带宽，稳定的一维 (1D) 磁性纳米带优于二维 (2D) 或块状材料。通过第一性原理计算、Wannier函数和蒙特卡罗模拟，发现GdX ₂ (X = Cl, Br)锯齿形纳米带(ZNRs)具有动态稳定性，铁磁基态的居里温度明显高于其二维的居里温度对方。结果表明，固有横向偶极矩和垂直磁晶各向异性能量 (PMAE) 在此类 1D 磁性 ZNR 中引起 Rashba 效应和谷极化的共存。具有四个锯齿链的GdBr _{2 ZNR (GdBr 2}-4ZNR)比GdCl ₂ -4ZNR具有更大的谷分裂和PMAE，表现出室温铁磁基态。_{通过调节GdBr 2} ZNR的带宽，在GdBr ₂ -5ZNR中观察到本征反常谷霍尔(AVH)效应。重要的是，类似狄拉克锥的电子态、PMAE 和 AVH 效应对纳米带带宽的增加具有鲁棒性，这对于利用至关重要。这些结果提供了重要的见解，并为磁性纳米带在自旋相关和谷相关微型信息存储设备中的潜在应用铺平了道路。