Details

Autor(en) / Beteiligte

• Tang, Y L
• Zhu, Y L
• Wang, Y J
• Wang, W Y
• Xu, Y B
• Ren, W J
• Zhang, Z D
• Ma, X L

Titel

Atomic-scale mapping of dipole frustration at 90° charged domain walls in ferroelectric PbTiO3 films

Ist Teil von

• Scientific reports, 2014-02, Vol.4 (1), p.4115-4115, Article 4115

Ort / Verlag

England: Nature Publishing Group

Erscheinungsjahr

2014

Link zum Volltext

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• The atomic-scale structural and electric parameters of the 90° domain-walls in tetragonal ferroelectrics are of technological importance for exploring the ferroelectric switching behaviors and various domain-wall-related novel functions. We have grown epitaxial PbTiO3/SrTiO3 multilayer films in which the electric dipoles at 90° domain-walls of ferroelectric PbTiO3 are characterized by means of aberration-corrected scanning transmission electron microscopy. Besides the well-accepted head-to-tail 90° uncharged domain-walls, we have identified not only head-to-head positively charged but also tail-to-tail negatively charged domain-walls. The widths, polarization distributions, and strains across these charged domain-walls are mapped quantitatively at atomic scale, where remarkable difference between these domain-walls is presented. This study is expected to provide fundamental information for understanding numerous novel domain-wall phenomena in ferroelectrics.