Revealing magnetic interactions from single-atom magnetization curves
Revealing magnetic interactions from single-atom magnetization curves
复制标题
DOI：
10.1126/science.1154415
复制
发表时间：
2008-04-04
期刊：
影响因子：
56.9
通讯作者：
Wiesendanger, Roland
中科院分区：
文献类型：
--
作者：
Meier, Focko;Zhou, Lihui;Wiesendanger, Roland
磁性器件向着单原子极限的小型化需要适当的工具来研究它们的磁性。我们展示了使用带有自旋极化尖端的扫描隧道显微镜测量吸附在非磁性金属基底上的单个磁性原子的磁化曲线的能力。我们可以绘制出原子尺度上的低能磁相互作用，Co 吸附原子与 Pt(111) 上的纳米线之间的振荡间接交换就证明了这一点。这些结果对于理解由于不同的局部环境而在明显相同的吸附原子的磁性中发现的变化非常重要。
The miniaturization of magnetic devices toward the limit of single atoms calls for appropriate tools to study their magnetic properties. We demonstrate the ability to measure magnetization curves of individual magnetic atoms adsorbed on a nonmagnetic metallic substrate with use of a scanning tunneling microscope with a spin- polarized tip. We can map out low- energy magnetic interactions on the atomic scale as evidenced by the oscillating indirect exchange between a Co adatom and a nanowire on Pt( 111). These results are important for the understanding of variations that are found in the magnetic properties of apparently identical adatoms because of different local environments.