Scaling behavior of an antiferroelectric hysteresis loop

Determination of Atomic Structure of the Metal-Oxide Interface: Pd Nanodeposits on an FeO(111) Film

“…[25]. Based on the analysis of the lowest unoccupied states near the Fermi level calculated for the optimized geometry, we have simulated the STM image of the FeO film as shown in Fig.…”

“…The structure of the FeO film formed on Pt(111) has been previously studied by Galloway et al [22,23], Fadley et al [24,25], and Weiss et al [26,27]. It has been shown that the oxide film consists of closely packed oxygen and iron layers and is terminated by oxygen [24].…”

Self-Organization of Gold Atoms on a Polar FeO(111) Surface

“…As model system for a polar oxide, we study a thin FeO(111) film where a surface dipole is built up between the Fe and the O ÿ layers [15][16][17]. The FeO surface potential is spatially modulated due to different stacking configurations of the Fe ions with respect to the Pt(111) support.…”

“…The influence of such perturbations on the adsorption energy is deduced from the arrangement of single Au atoms on the FeO film, as measured with an ultrahigh vacuum STM operated at 5 K [18]. The oxide is prepared by depositing one Fe layer onto a clean Pt(111) surface at 300 K, followed by oxidation in 1 10 ÿ6 mbar O 2 at 950 K. The procedure results in the formation of a wellordered bilayer of FeO(111) with O ions forming the topmost plane [15,16]. The Fe-Fe distance of 3.1 Å in the film is slightly enlarged with respect to the (111) plane in bulk FeO.…”

“…This rather coplanar arrangement of positively charged Fe ions and negatively charged O ions is an effective way to reduce the surface dipole of this polar film. The lattice mismatch between FeO and Pt(111) of 3.08 Å versus 2.76 Å gives rise to a Moiré pattern with a periodicity of 25 Å [15][16][17]. The Moiré cell is divided into three domains, where Fe atoms alternately occupy on-top, fcc, and hcp positions on the Pt(111) [ Fig.…”