Acosta, Matias ; Liu, Na ; Deluca, Marco ; Heidt, Sabrina ; Ringl, Ines ; Dietz, Christian ; Stark, Robert W. ; Jo, Wook (2015)
Tailoring ergodicity through selective A-site doping in the Bi1/2Na1/2TiO3–Bi1/2K1/2TiO3 system.
In: Journal of Applied Physics, 117 (13)
doi: 10.1063/1.4916719
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The morphotropic phase boundary composition Bi1/2 Na 1/2TiO3-20 mol. % Bi1/2K1/2TiO3 was chosen as initial material to do selective A-site aliovalent doping replacing Na and K by 1 at. % La, respectively. The materials were studied macroscopically by measuring dielectric and electromechanical properties. The Na-replaced material has a lower freezing temperature Tfr, lower remanent polarization and remanent strain, and thus a higher degree of ergodicity than the K-replaced material. These results are contrasted with local poling experiments and hysteresis loops obtained from piezoresponse force microscopy. The faster relaxation of the tip-induced local polarization and the lower remanent state in bias-on and -off loops confirm the higher degree of ergodicity of the Na-replaced material. The difference in functional properties is attributed to small variations in chemical pressure achieved through selective doping. Raman results support this working hypothesis.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2015 |
| Autor(en): | Acosta, Matias ; Liu, Na ; Deluca, Marco ; Heidt, Sabrina ; Ringl, Ines ; Dietz, Christian ; Stark, Robert W. ; Jo, Wook |
| Art des Eintrags: | Bibliographie |
| Titel: | Tailoring ergodicity through selective A-site doping in the Bi1/2Na1/2TiO3–Bi1/2K1/2TiO3 system |
| Sprache: | Englisch |
| Publikationsjahr: | 7 April 2015 |
| Verlag: | AIP Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Applied Physics |
| Jahrgang/Volume einer Zeitschrift: | 117 |
| (Heft-)Nummer: | 13 |
| DOI: | 10.1063/1.4916719 |
| Kurzbeschreibung (Abstract): | The morphotropic phase boundary composition Bi1/2 Na 1/2TiO3-20 mol. % Bi1/2K1/2TiO3 was chosen as initial material to do selective A-site aliovalent doping replacing Na and K by 1 at. % La, respectively. The materials were studied macroscopically by measuring dielectric and electromechanical properties. The Na-replaced material has a lower freezing temperature Tfr, lower remanent polarization and remanent strain, and thus a higher degree of ergodicity than the K-replaced material. These results are contrasted with local poling experiments and hysteresis loops obtained from piezoresponse force microscopy. The faster relaxation of the tip-induced local polarization and the lower remanent state in bias-on and -off loops confirm the higher degree of ergodicity of the Na-replaced material. The difference in functional properties is attributed to small variations in chemical pressure achieved through selective doping. Raman results support this working hypothesis. |
| Freie Schlagworte: | Doping; Materials properties; Relaxor ferroelectrics; Polarization; Sodium |
| Zusätzliche Informationen: | SFB 595 A1 |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Nichtmetallisch-Anorganische Werkstoffe 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Physics of Surfaces DFG-Sonderforschungsbereiche (inkl. Transregio) DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche Exzellenzinitiative Exzellenzinitiative > Exzellenzcluster Zentrale Einrichtungen DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 595: Elektrische Ermüdung DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 595: Elektrische Ermüdung > A - Synthese DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 595: Elektrische Ermüdung > A - Synthese > Teilprojekt A1: Herstellung keramischer, texturierter Akuatoren mit hoher Dehnung Profilbereiche > Thermo-Fluids & Interfaces Profilbereiche |
| Hinterlegungsdatum: | 07 Apr 2015 08:36 |
| Letzte Änderung: | 21 Sep 2016 11:28 |
| PPN: | |
| Sponsoren: | This work was supported by the Deutsche Forschungsgemeinschaft through the Sonderforschungsbereich 595/D6 “Electrical Fatigue in Functional Materials” and the AdRIA Hesse state center for Adaptronics. |
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