Institute of Applied Physics, University of Hamburg, Jungiusstrasse 11, 20355 Hamburg, Germany.
Phys Rev Lett. 2011 Jun 24;106(25):257202. doi: 10.1103/PhysRevLett.106.257202.
We demonstrate that magnetic exchange force spectroscopy allows for a quantitative determination of the distance-dependent magnetic exchange interaction across a vacuum gap. Experiments were performed on the antiferromagnetic Fe monolayer on W(001) with magnetically sensitive tips and compared to first-principles calculations performed for different cluster tip models. For stable tips, which can be distinguished from unstable tips by analyzing the dissipation signal, very good agreement with theory is observed.
我们证明了磁交换力谱可以定量确定穿过真空间隙的距离相关磁交换相互作用。实验是在 W(001)上的反铁磁 Fe 单层上进行的，使用了磁敏探针，并与针对不同的团簇探针模型进行的第一性原理计算进行了比较。对于可以通过分析耗散信号与不稳定探针区分开来的稳定探针，观察到与理论非常好的一致性。
