Abstract
Tunneling spectra are measured at various positions on iron-depositedsurfaces of superconducting 2H-NbSe2 crystals using scanning tunnelingmicroscopy at 4.2 K. Iron islands are formed on the surface at the initial deposition stage at room temperature. For isolated iron islands, the spectra around the islands are slightly modified from the original for the superconductor and depend on the distance from the islands. The spectra change significantly and have spatial dependence on the surface where iron islands are randomly and densely distributed. The spatial changes are discussed with inhomogeneous magnetic scatterings of substrate superconducting electrons by the iron islands.
