| Autor: |
Khadir, D. S. A., Abdelkafi, Zied, Hadouch, Y., Abdelmoula, N., Mezzane, D., Khemakhem, H. |
| Předmět: |
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| Zdroj: |
Applied Physics A: Materials Science & Processing; Jul2023, Vol. 129 Issue 7, p1-8, 8p, 1 Black and White Photograph, 1 Chart, 5 Graphs |
| Abstrakt: |
The praseodymium Pr3+ doped at Bi site of Ba0.1Bi0.9(Ti0.9Zr0.1)0.1Fe0.9O3, under low concentrations (0%, 0.1%, 0.5% and 1% abbreviated as BBTZF0, Pr-BBTZF001, Pr-BBTZF005 and Pr-BBTZF01, respectively) were prepared by the solid-state reaction method. A detailed investigation has been made on structural, microstructural, ferroelectric and dielectric properties of Ba0.1(Bi1−xPrx)0.9(Ti0.9Zr0.1)0.1Fe0.9O3 ceramics. Rietveld refinement fitting revealed that the structure of these ceramics, at room temperature is rhombohedral with space group R3c. The cell volume decreased with increasing Pr-content due to the smaller ionic radius of the Pr. Temperature dependence of the dielectric constant (ε′r) of all prepared ceramics showed anomaly around TN (antiferromagnetic transition temperature); thus suggesting a magneto-electric coupling in these materials. The shift of TN with frequency is attributed to the Maxwell Wagner relaxation rather than the relaxor behavior. The P–E loop study shows the improved ferroelectric behavior and the reduced leakage current density with Pr doping. Moreover, the energy storage properties showed a clear enhancement upon the increase of the Pr concentration. The recoverable energy storage density (Wrec) of 2.75 J cm−3 with energy storage efficiency (η) of 44.52% was achieved for Pr-BBTZF01. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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