Ma, Yang-Bin ; Molin, Christian ; Shvartsman, Vladimir V. ; Gebhardt, Sylvia ; Lupascu, Doru C. ; Albe, Karsten ; Xu, Bai-Xiang (2017)
State transition and electrocaloric effect of BaZr_xTi_1-xO_3: Simulation and experiment.
In: J. Appl. Phys., 121 (2)
doi: 10.1063/1.4973574
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
We present a systematic study on the relation of the electrocaloric effect (ECE) and the relaxor state transition of BaZrxTi1−xO3 (BZT) using a combination of computer simulation and experiment. The results of canonical and microcanonical lattice-based Monte Carlo simulations with a Ginzburg-Landau-type Hamiltonian are compared with measurements of BaZrxTi1−xO3 (x = 0.12 and 0.2) samples. In particular, we study the ECE at various temperatures, domain patterns by piezoresponse force microscopy at room temperature, and the P-E loops at various temperatures. We find three distinct regimes depending on the Zr-concentration. In the compositional range 0≤x≤0.2, ferroelectric domains are visible, but the ECE peak drops considerably with increasing Zr-concentration. In the range 0.3≤x≤0.7, relaxor features become prominent, and the decrease in the ECE with Zr-concentration is moderate. In the range of high concentrations, x≥0.8, the material is almost nonpolar, and there is no ECE peak visible. Our results reveal that BZT with a Zr-concentration around x=0.12∼0.3 exhibits a relatively large ECE in a wide temperature range at rather low temperature.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2017 |
| Autor(en): | Ma, Yang-Bin ; Molin, Christian ; Shvartsman, Vladimir V. ; Gebhardt, Sylvia ; Lupascu, Doru C. ; Albe, Karsten ; Xu, Bai-Xiang |
| Art des Eintrags: | Bibliographie |
| Titel: | State transition and electrocaloric effect of BaZr_xTi_1-xO_3: Simulation and experiment |
| Sprache: | Englisch |
| Publikationsjahr: | 10 Januar 2017 |
| Verlag: | American Institute of Physics |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | J. Appl. Phys. |
| Jahrgang/Volume einer Zeitschrift: | 121 |
| (Heft-)Nummer: | 2 |
| DOI: | 10.1063/1.4973574 |
| Kurzbeschreibung (Abstract): | We present a systematic study on the relation of the electrocaloric effect (ECE) and the relaxor state transition of BaZrxTi1−xO3 (BZT) using a combination of computer simulation and experiment. The results of canonical and microcanonical lattice-based Monte Carlo simulations with a Ginzburg-Landau-type Hamiltonian are compared with measurements of BaZrxTi1−xO3 (x = 0.12 and 0.2) samples. In particular, we study the ECE at various temperatures, domain patterns by piezoresponse force microscopy at room temperature, and the P-E loops at various temperatures. We find three distinct regimes depending on the Zr-concentration. In the compositional range 0≤x≤0.2, ferroelectric domains are visible, but the ECE peak drops considerably with increasing Zr-concentration. In the range 0.3≤x≤0.7, relaxor features become prominent, and the decrease in the ECE with Zr-concentration is moderate. In the range of high concentrations, x≥0.8, the material is almost nonpolar, and there is no ECE peak visible. Our results reveal that BZT with a Zr-concentration around x=0.12∼0.3 exhibits a relatively large ECE in a wide temperature range at rather low temperature. |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Mechanik Funktionaler Materialien 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Materialmodellierung |
| Hinterlegungsdatum: | 23 Jan 2017 08:03 |
| Letzte Änderung: | 26 Jan 2024 09:21 |
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