论文标题
AU4MN，一种局部的铁磁铁，具有强旋转轨道耦合，远程铁磁交换和高居里温度
Au4Mn, a localized ferromagnet with strong spin-orbit coupling, long-range ferromagnetic exchange and high Curie temperature
论文作者
论文摘要
金属MN基于邻元的MN-MN距离大于0.4 nm的合金表现出较大的，位置良好的磁矩。在这里，我们研究了四方AU4MN的磁性，其温度为385 K，其中锰的旋转力矩为4.1 MUB，其轨道矩淬灭。由于80％的原子是黄金，因此自旋轨道相互作用很强，AU4MN表现出在室温下具有表面迷宫域的单轴磁晶的各向异性。 1.0的磁性硬度参数足以维持沿C轴的磁化，以使任何形状的样品。 AU还通过5D-3D轨道杂交减少MN的自旋力矩。在40 T的脉冲场下，在AU上发现了0.05 MUB的诱导力矩。密度功能理论计算表明MN-MN交换是由自旋极化的金5D和6P电子介导的。距离依赖性表明，MN邻居的前十个壳为1.041 nm（64个原子）的铁磁或零是零，并且此后非常弱且振动性。
Metallic Mn-based alloys with a nearest-neighbor Mn-Mn distance greater than 0.4 nm exhibit large, well-localized magnetic moments. Here we investigate the magnetism of tetragonal Au4Mn with a Curie temperature of 385 K, where manganese has a spin moment of 4.1 muB and its orbital moment is quenched. Since 80% of the atoms are gold, the spin orbit interaction is strong and Au4Mn exhibits uniaxial magnetocrystalline anisotropy with surface maze domains at room temperature. The magnetic hardness parameter of 1.0 is sufficient to maintain the magnetization along the c-axis for a sample of any shape. Au also reduces the spin moment of Mn through 5d-3d orbital hybridization. An induced moment of 0.05 muB was found on Au under a pulsed field of 40 T. Density functional theory calculations indicate that the Mn-Mn exchange is mediated by spin-polarized gold 5d and 6p electrons. The distance-dependence shows that it is ferromagnetic or zero for the first ten shells of Mn neighbors out to 1.041 nm (64 atoms), and very weak and oscillatory thereafter.
