TY  - CONF
AU  - Radojković, Aleksandar
AU  - Luković Golić, Danijela
AU  - Ćirković, Jovana
AU  - Pajić, Damir
AU  - Torić, Filip
AU  - Dapčević, Aleksandra
AU  - Branković, Zorica
AU  - Branković, Goran
PY  - 2019
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1754
AB  - BiFeO3, as one of few multiferroic perovskites, is distinguished by some drawbacks such as high leakage current,
low remnant magnetic polarization, high electric coercive field, and difficulties of pure phase synthesis that still
keep it away from any practical use in electronics. There have been many attempts to improve the overall properties
of BiFeO3 by A- or B-site doping or by both. It was found that B-site doping with Nb can potentially improve both
the ferroelectric and magnetic properties of BiFeO3. In this study, BiFe1–xNbxO3 (x=0.002; 0.005 and 0.01) bulk ceramics
were investigated in the quest for a more integral understanding of changes in multiferroic properties caused by
light Nb doping (≤ 1 mole%). BiFe1–xNbxO3 powders were synthesized by hydro evaporation method and only traces
of the secondary phases were observed. Multiferroic properties of bulk ceramics were investigated using X-ray
diffraction (XRD) analysis, scanning electron spectroscopy (SEM), polarization (PMTS), and magnetization (SQUID)
techniques. It was shown that even small percentages of Nb could notably change the electric and magnetic
behavior of BiFeO3. The electric conductivity differed by two orders of magnitude between samples doped with
0.2 and 1% Nb. The ferroelectric behavior strongly depended on the conduction mechanism, and the transition from
space-charge-limited current (SCLC) conduction to trap-filled Limited (TFL) conduction regime reflected on a
change in hysteresis patterns, particularly for the samples with 0.2 and 0.5% Nb. ZFC-FC magnetization curves were
separated for all Nb concentrations and the degree of separation increased with Nb doping. Weak ferromagnetic
behavior was observed from the hysteresis measurements and the increase of remnant magnetization with Nb
concentration. The coercive magnetic field changed drastically compared to the pure BiFeO3, namely, the sample with
1% Nb exhibited a very high coercive magnetic field of ~10 kOe.
PB  - Innovinc International
C3  - 3rd World Chemistry Conference and Exhibition
T1  - Tuning of BiFeO3  multiferroic properties by light doping with Nb
SP  - 26
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_1754
ER  - 

@conference{
author = "Radojković, Aleksandar and Luković Golić, Danijela and Ćirković, Jovana and Pajić, Damir and Torić, Filip and Dapčević, Aleksandra and Branković, Zorica and Branković, Goran",
year = "2019",
abstract = "BiFeO3, as one of few multiferroic perovskites, is distinguished by some drawbacks such as high leakage current,
low remnant magnetic polarization, high electric coercive field, and difficulties of pure phase synthesis that still
keep it away from any practical use in electronics. There have been many attempts to improve the overall properties
of BiFeO3 by A- or B-site doping or by both. It was found that B-site doping with Nb can potentially improve both
the ferroelectric and magnetic properties of BiFeO3. In this study, BiFe1–xNbxO3 (x=0.002; 0.005 and 0.01) bulk ceramics
were investigated in the quest for a more integral understanding of changes in multiferroic properties caused by
light Nb doping (≤ 1 mole%). BiFe1–xNbxO3 powders were synthesized by hydro evaporation method and only traces
of the secondary phases were observed. Multiferroic properties of bulk ceramics were investigated using X-ray
diffraction (XRD) analysis, scanning electron spectroscopy (SEM), polarization (PMTS), and magnetization (SQUID)
techniques. It was shown that even small percentages of Nb could notably change the electric and magnetic
behavior of BiFeO3. The electric conductivity differed by two orders of magnitude between samples doped with
0.2 and 1% Nb. The ferroelectric behavior strongly depended on the conduction mechanism, and the transition from
space-charge-limited current (SCLC) conduction to trap-filled Limited (TFL) conduction regime reflected on a
change in hysteresis patterns, particularly for the samples with 0.2 and 0.5% Nb. ZFC-FC magnetization curves were
separated for all Nb concentrations and the degree of separation increased with Nb doping. Weak ferromagnetic
behavior was observed from the hysteresis measurements and the increase of remnant magnetization with Nb
concentration. The coercive magnetic field changed drastically compared to the pure BiFeO3, namely, the sample with
1% Nb exhibited a very high coercive magnetic field of ~10 kOe.",
publisher = "Innovinc International",
journal = "3rd World Chemistry Conference and Exhibition",
title = "Tuning of BiFeO3  multiferroic properties by light doping with Nb",
pages = "26",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_1754"
}

Radojković, A., Luković Golić, D., Ćirković, J., Pajić, D., Torić, F., Dapčević, A., Branković, Z.,& Branković, G.. (2019). Tuning of BiFeO3  multiferroic properties by light doping with Nb. in 3rd World Chemistry Conference and Exhibition
Innovinc International., 26.
https://hdl.handle.net/21.15107/rcub_rimsi_1754

Radojković A, Luković Golić D, Ćirković J, Pajić D, Torić F, Dapčević A, Branković Z, Branković G. Tuning of BiFeO3  multiferroic properties by light doping with Nb. in 3rd World Chemistry Conference and Exhibition. 2019;:26.
https://hdl.handle.net/21.15107/rcub_rimsi_1754 .

Radojković, Aleksandar, Luković Golić, Danijela, Ćirković, Jovana, Pajić, Damir, Torić, Filip, Dapčević, Aleksandra, Branković, Zorica, Branković, Goran, "Tuning of BiFeO3  multiferroic properties by light doping with Nb" in 3rd World Chemistry Conference and Exhibition (2019):26,
https://hdl.handle.net/21.15107/rcub_rimsi_1754 .