期刊
SURFACE SCIENCE
卷 450, 期 1-2, 页码 L273-L279出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S0039-6028(00)00230-2
关键词
iron oxide; low index single crystal surfaces; photoelectron diffraction; scanning tunneling microscopy; surface relaxation and reconstruction; surface structure, morphology, roughness, and topography
We have investigated the surface termination and interlayer relaxations of (root 2 x root 2)R45 degrees-Fe3O4(001) as grown on MgO(001) by oxygen-plasma-assisted molecular beam epitaxy. Despite the fact that autocompensated surfaces can be constructed in principle by terminating with either a half layer of tetrahedral Fe, or a modified layer of octahedral Fe plus tetrahedral O, the combination of photoelectron diffraction and scanning tunneling microscopy suggests the former. The first four interlayer spacings are relaxed by -14, -57, -19, and +29% of the respective bulk value. (C) 2000 Elsevier Science B.V. All rights reserved.
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