The (1 x 1) to (1 x 5) reconstruction of the Ir(001) surface by pulsed-laser heating was observed by use of a field-ion microscope. The quasi-hexagonal atomic arrangement of the reconstructed (1 x 5) structure could be revealed by gradual field evaporation of the reconstructed layer. The field-ion microscope image structure was consistent with the quasi-hexagonal model, but the details of the buckling depend on the size of the plane. The buckling was relaxed at the edge of a small plane.

(11) to (15) Surface Reconstruction of Ir(001) by Pulsed-Laser Heating - a Field-Ion-Microscope Study. T.T.Tsong, Q.Gao: Physical Review B, 1987, 35, 7764-6