Figure 2 : DC magnetization of a macroscopic sample containing the Sn nanowires measured under ZFC (squares) and FC (circles) conditions.

From: Dramatic enhancement of superconductivity in single-crystalline nanowire arrays of Sn

Figure 2

The right inset shows an enlargement of the transition onset, which shows that a weak Meissner signal develops below ~5.5 K. The left inset shows the difference ΔM = MZFC − MFC between the ZFC and FC branches.