MRS Proceedings


Surface Characterization of Clean Gd5Ge4(010)

2012 MRS Fall Meeting.

Chad D. Yuena1a2, Gordon J. Millera1a2 and Patricia A. Thiela1a2a3

a1 Ames Laboratory, Iowa State University, Ames, Iowa, 50011

a2 Department of Chemistry, Iowa State University, Ames, Iowa 50011

a3 Department of Material Science and Engineering, Iowa State University, Ames, Iowa 50011


Based on X-ray photoelectron spectroscopy, Gd5Ge4(010) does not show evidence of surface segregation. Scanning tunneling microscopy reveals two types of terraces which alternate laterally on the surface. From the step heights, these two surface terminations are assigned as dense, Gd-pure layers in the bulk structure. There is evidence of reconstruction on one type of terrace.

Key Words:

  • quasicrystal;
  • scanning tunneling microscopy (STM);
  • alloy