Single Vortex Pinning and Penetration Depth in Superconducting NdFeAsO${}_{1-x}$F${}_x$

Jessie T. Zhang, Jeehoon Kim, Magdalena Huefner +6

We use a magnetic force microscope (MFM) to investigate single vortex pinning and penetration depth in NdFeAsO${}_{1-x}$F${}_x$, one of the highest-$T_c$ iron-based superconductors. In…