Schrade, D. ; Müller, R. ; Gross, D. ; Steinmann, P. (2015)
Phase field simulations of the poling behavior of BaTiO3 nano-scale thin films with SrRuO3 and Au electrodes.
In: European Journal of Mechanics - A/Solids, 49
doi: 10.1016/j.euromechsol.2014.08.007
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
A continuum phase field model is used to investigate the poling behavior of BaTiO3 (BTO) thin films with thicknesses ranging from 1 nme80 nm. The finite element simulations focus on the influence of the electrode material on the electrical hysteresis curves. The 15 nm thick electrodes consist of either SrRuO3 (SRO) or Au and are explicitly included in the simulations. Experimental evidence suggests that there is a depolarization field in SRO-electroded BTO thin films. This depolarization field, which is due to an imperfect charge compensation by the electrodes, causes a suppression of ferroelectricity for film thicknesses of a few unit cells. The depolarization field and its effect on the electrical behavior is captured by a Robin type boundary condition for the order parameter of the phase field model. This boundary condition is applied at the interface between the thin film and the top and bottom electrode.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2015 |
| Autor(en): | Schrade, D. ; Müller, R. ; Gross, D. ; Steinmann, P. |
| Art des Eintrags: | Bibliographie |
| Titel: | Phase field simulations of the poling behavior of BaTiO3 nano-scale thin films with SrRuO3 and Au electrodes |
| Sprache: | Englisch |
| Publikationsjahr: | Januar 2015 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | European Journal of Mechanics - A/Solids |
| Jahrgang/Volume einer Zeitschrift: | 49 |
| DOI: | 10.1016/j.euromechsol.2014.08.007 |
| URL / URN: | https://linkinghub.elsevier.com/retrieve/pii/S09977538140011... |
| Kurzbeschreibung (Abstract): | A continuum phase field model is used to investigate the poling behavior of BaTiO3 (BTO) thin films with thicknesses ranging from 1 nme80 nm. The finite element simulations focus on the influence of the electrode material on the electrical hysteresis curves. The 15 nm thick electrodes consist of either SrRuO3 (SRO) or Au and are explicitly included in the simulations. Experimental evidence suggests that there is a depolarization field in SRO-electroded BTO thin films. This depolarization field, which is due to an imperfect charge compensation by the electrodes, causes a suppression of ferroelectricity for film thicknesses of a few unit cells. The depolarization field and its effect on the electrical behavior is captured by a Robin type boundary condition for the order parameter of the phase field model. This boundary condition is applied at the interface between the thin film and the top and bottom electrode. |
| Fachbereich(e)/-gebiet(e): | 13 Fachbereich Bau- und Umweltingenieurwissenschaften 13 Fachbereich Bau- und Umweltingenieurwissenschaften > Fachgebiete der Mechanik 13 Fachbereich Bau- und Umweltingenieurwissenschaften > Fachgebiete der Mechanik > Fachgebiet Kontinuumsmechanik |
| Hinterlegungsdatum: | 04 Mai 2022 13:59 |
| Letzte Änderung: | 04 Mai 2022 13:59 |
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