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| Hauptseite > Publikationsdatenbank > Studies of Local Structural Disortions in Strained Ultrathin BaTiO3 Films sing Scanning Transmission Electron Microscopy > print |
| Hauptseite > Publikationsdatenbank > Studies of Local Structural Disortions in Strained Ultrathin BaTiO3 Films sing Scanning Transmission Electron Microscopy > print |
| 001 | 173018 | ||
| 005 | 20240610120436.0 | ||
| 024 | 7 | _ | |a 10.1017/S1431927614000518 |2 doi |
| 024 | 7 | _ | |a WOS:000339158700014 |2 WOS |
| 037 | _ | _ | |a FZJ-2014-06431 |
| 041 | _ | _ | |a English |
| 082 | _ | _ | |a 570 |
| 100 | 1 | _ | |a Park, D. |0 P:(DE-HGF)0 |b 0 |e Corresponding Author |
| 245 | _ | _ | |a Studies of Local Structural Disortions in Strained Ultrathin BaTiO3 Films sing Scanning Transmission Electron Microscopy |
| 260 | _ | _ | |a New York, NY |c 2014 |b Cambridge University Press |
| 336 | 7 | _ | |a Journal Article |b journal |m journal |0 PUB:(DE-HGF)16 |s 1417707360_21919 |2 PUB:(DE-HGF) |
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| 336 | 7 | _ | |a article |2 DRIVER |
| 520 | _ | _ | |a Ultrathin ferroelectric heterostructures (SrTiO3/BaTiO3/BaRuO3/SrRuO3) were studied by scanning transmission electron microscopy (STEM) in terms of structural distortions and atomic displacements. The TiO2-termination at the top interface of the BaTiO3 layer was changed into a BaO-termination by adding an additional BaRuO3 layer. High-angle annular dark-field (HAADF) imaging by aberration-corrected STEM revealed that an artificially introduced BaO-termination can be achieved by this interface engineering. By using fast sequential imaging and frame-by-frame drift correction, the effect of the specimen drift was significantly reduced and the signal-to-noise ratio of the HAADF images was improved. Thus, a quantitative analysis of the HAADF images was feasible, and an in-plane and out-of-plane lattice spacing of the BaTiO3 layer of 3.90 and 4.22 Å were determined. A 25 pm shift of the Ti columns from the center of the unit cell of BaTiO3 along the c-axis was observed. By spatially resolved electron energy-loss spectroscopy studies, a reduction of the crystal field splitting (CFS, ΔL3=1.93 eV) and an asymmetric broadening of the e g peak were observed in the BaTiO3 film. These results verify the presence of a ferroelectric polarization in the ultrathin BaTiO3 film. |
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| 773 | _ | _ | |a 10.1017/S1431927614000518 |0 PERI:(DE-600)1481716-0 |p 740 -747 |t Microscopy and microanalysis |v 20 |y 2014 |x 1431-9276 |
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