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Change in structural, ferroelectric, and magnetic properties of bismuth ferrite induced by doping with gadolinium.

Change in structural, ferroelectric, and magnetic properties of bismuth ferrite induced by doping with gadolinium.

Authors :
Golić, Danijela Luković
Radojković, Aleksandar
Dapčević, Aleksandra
Pajić, Damir
Dragović, Jure
Torić, Filip
Ćirković, Jovana
Branković, Goran
Branković, Zorica
Source :
Ceramics International. Oct2019, Vol. 45 Issue 15, p19158-19165. 8p.
Publication Year :
2019

Abstract

Bismuth ferrite, BiFeO 3 , was doped with a wide range of concentrations (0–30%) of Gd in order to investigate structural, ferroelectric, and magnetic properties and their correlation. Powder samples of Bi 1- x Gd x FeO 3 (x = 0.00–0.30) were prepared using the hydro-evaporation synthesis method. Sintering process at 870 °C for 6 h of as-prepared, Gd doped BiFeO 3 powders resulted in ceramic samples with relative densities in the range of (74–86) %. XRD analysis revealed that Bi 1- x Gd x FeO 3 samples (x = 0.00–0.09) crystallized in rhombohedral phase; Bi 1- x Gd x FeO 3 samples (x = 0.10–0.20) contained both rhombohedral and orthorhombic phases, while Bi 1- x Gd x FeO 3 (x = 0.30) sample contained only the orthorhombic phase. The structural parameters obtained after Rietveld refinement for single-phase Bi 1- x Gd x FeO 3 ceramic samples and microstructure image analysis were correlated with the results of ferroelectric and magnetic measurements. Bi 1- x Gd x FeO 3 (x = 0.0625, 0.075, 0.09) samples showed improved ferroelectric properties and reduced leakage current density in comparison with undoped BiFeO 3. Gradual increase in Gd content in BiFeO 3 led to enhanced magnetic responses and weak ferromagnetic behavior. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
02728842
Volume :
45
Issue :
15
Database :
Academic Search Index
Journal :
Ceramics International
Publication Type :
Academic Journal
Accession number :
138102172
Full Text :
https://doi.org/10.1016/j.ceramint.2019.06.162