B-site doping as a strategy for tailoring BiFeO3 properties
Autori
Radojković, AleksandarLuković Golić, Danijela
Ćirković, Jovana
Dapčevć, Aleksandra
Pajić, Damir
Torić, Filip
Branković, Zorica
Branković, Goran
Konferencijski prilog (Objavljena verzija)
Metapodaci
Prikaz svih podataka o dokumentuApstrakt
Ferroelectric, magnetic and structural properties of BiFe1–xNbxO3 (x = 0.002,
0.005 and 0.01) ceramics were investigated in order to study the influence of B-site
doping of multiferroic BiFeO3. It is known that pure BiFeO3 exhibits G-type of
antiferromagnetism below Néel temperature (TN = 370 °C) and spontaneous
polarization along one of the eight pseudo-cubic [111] axes below Curie temperature
(TC = 826–845 °C). However, poor ferroelectric (high electrical conductivity) and
weak ferromagnetism of pure BiFeO3 can be enhanced by doping. In this study,
Nb5+ was introduced to replace Fe3+ (B-site doping) since it could disturb the nearly
antiparallel spin ordering of the adjacent Fe3+ ions responsible for cycloidal (spiral)
spin structure. On the other hand, the pentivalent Nb cations will reduce the amount
of oxygen vacancies and consequently reduce the electrical conductivity. It was
shown that 1 % Nb drastically changed the magnetic properties compared with pure
BiFeO3: whi...le the remnant magnetization at 300 K reaches only 0.0042 emu/g at
applied magnetic fields up to 50 000 Oe, the coercive magnetic field as high as
~7460 Oe classifies BiFe0.99Nb0.01O3 as hard magnetic material. With lower Nb
content the magnetic properties moved up towards the properties of pure BiFeO3.
Relatively inferior ferroelectric properties showed the sample with 0.2 % Nb, since
its hysteresis loops deformed at electrical fields higher than 40 kV/cm. At the
highest applied electrical field (70 kV/cm) only the sample with 1 % Nb showed a
stable ferroelectric response with hysteresis periods up to 1000 ms, with the highest
remnant electrical polarization of 0.5 μC/cm2
and the coercive electrical field of 22.2
kV/cm. Thus, it was shown that by carefully selected dopant it was possible to
improve both magnetic and ferroelectric properties of BiFeO3.
Ključne reči:
Bismuth ferrite, multiferroics, ferroelectric propertiesIzvor:
4th Conference of The Serbian Society for Ceramic Materials, 2017, 95-Izdavač:
- Društvo za keramičke materijale Srbije
Finansiranje / projekti:
- 0-3D nanostrukture za primenu u elektronici i obnovljivim izvorima energije: sinteza, karakterizacija i procesiranje (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45007)
Institucija/grupa
Institut za multidisciplinarna istraživanjaTY - CONF AU - Radojković, Aleksandar AU - Luković Golić, Danijela AU - Ćirković, Jovana AU - Dapčevć, Aleksandra AU - Pajić, Damir AU - Torić, Filip AU - Branković, Zorica AU - Branković, Goran PY - 2017 UR - http://rimsi.imsi.bg.ac.rs/handle/123456789/2330 AB - Ferroelectric, magnetic and structural properties of BiFe1–xNbxO3 (x = 0.002, 0.005 and 0.01) ceramics were investigated in order to study the influence of B-site doping of multiferroic BiFeO3. It is known that pure BiFeO3 exhibits G-type of antiferromagnetism below Néel temperature (TN = 370 °C) and spontaneous polarization along one of the eight pseudo-cubic [111] axes below Curie temperature (TC = 826–845 °C). However, poor ferroelectric (high electrical conductivity) and weak ferromagnetism of pure BiFeO3 can be enhanced by doping. In this study, Nb5+ was introduced to replace Fe3+ (B-site doping) since it could disturb the nearly antiparallel spin ordering of the adjacent Fe3+ ions responsible for cycloidal (spiral) spin structure. On the other hand, the pentivalent Nb cations will reduce the amount of oxygen vacancies and consequently reduce the electrical conductivity. It was shown that 1 % Nb drastically changed the magnetic properties compared with pure BiFeO3: while the remnant magnetization at 300 K reaches only 0.0042 emu/g at applied magnetic fields up to 50 000 Oe, the coercive magnetic field as high as ~7460 Oe classifies BiFe0.99Nb0.01O3 as hard magnetic material. With lower Nb content the magnetic properties moved up towards the properties of pure BiFeO3. Relatively inferior ferroelectric properties showed the sample with 0.2 % Nb, since its hysteresis loops deformed at electrical fields higher than 40 kV/cm. At the highest applied electrical field (70 kV/cm) only the sample with 1 % Nb showed a stable ferroelectric response with hysteresis periods up to 1000 ms, with the highest remnant electrical polarization of 0.5 μC/cm2 and the coercive electrical field of 22.2 kV/cm. Thus, it was shown that by carefully selected dopant it was possible to improve both magnetic and ferroelectric properties of BiFeO3. PB - Društvo za keramičke materijale Srbije C3 - 4th Conference of The Serbian Society for Ceramic Materials T1 - B-site doping as a strategy for tailoring BiFeO3 properties SP - 95 UR - https://hdl.handle.net/21.15107/rcub_rimsi_2330 ER -
@conference{ author = "Radojković, Aleksandar and Luković Golić, Danijela and Ćirković, Jovana and Dapčevć, Aleksandra and Pajić, Damir and Torić, Filip and Branković, Zorica and Branković, Goran", year = "2017", abstract = "Ferroelectric, magnetic and structural properties of BiFe1–xNbxO3 (x = 0.002, 0.005 and 0.01) ceramics were investigated in order to study the influence of B-site doping of multiferroic BiFeO3. It is known that pure BiFeO3 exhibits G-type of antiferromagnetism below Néel temperature (TN = 370 °C) and spontaneous polarization along one of the eight pseudo-cubic [111] axes below Curie temperature (TC = 826–845 °C). However, poor ferroelectric (high electrical conductivity) and weak ferromagnetism of pure BiFeO3 can be enhanced by doping. In this study, Nb5+ was introduced to replace Fe3+ (B-site doping) since it could disturb the nearly antiparallel spin ordering of the adjacent Fe3+ ions responsible for cycloidal (spiral) spin structure. On the other hand, the pentivalent Nb cations will reduce the amount of oxygen vacancies and consequently reduce the electrical conductivity. It was shown that 1 % Nb drastically changed the magnetic properties compared with pure BiFeO3: while the remnant magnetization at 300 K reaches only 0.0042 emu/g at applied magnetic fields up to 50 000 Oe, the coercive magnetic field as high as ~7460 Oe classifies BiFe0.99Nb0.01O3 as hard magnetic material. With lower Nb content the magnetic properties moved up towards the properties of pure BiFeO3. Relatively inferior ferroelectric properties showed the sample with 0.2 % Nb, since its hysteresis loops deformed at electrical fields higher than 40 kV/cm. At the highest applied electrical field (70 kV/cm) only the sample with 1 % Nb showed a stable ferroelectric response with hysteresis periods up to 1000 ms, with the highest remnant electrical polarization of 0.5 μC/cm2 and the coercive electrical field of 22.2 kV/cm. Thus, it was shown that by carefully selected dopant it was possible to improve both magnetic and ferroelectric properties of BiFeO3.", publisher = "Društvo za keramičke materijale Srbije", journal = "4th Conference of The Serbian Society for Ceramic Materials", title = "B-site doping as a strategy for tailoring BiFeO3 properties", pages = "95", url = "https://hdl.handle.net/21.15107/rcub_rimsi_2330" }
Radojković, A., Luković Golić, D., Ćirković, J., Dapčevć, A., Pajić, D., Torić, F., Branković, Z.,& Branković, G.. (2017). B-site doping as a strategy for tailoring BiFeO3 properties. in 4th Conference of The Serbian Society for Ceramic Materials Društvo za keramičke materijale Srbije., 95. https://hdl.handle.net/21.15107/rcub_rimsi_2330
Radojković A, Luković Golić D, Ćirković J, Dapčevć A, Pajić D, Torić F, Branković Z, Branković G. B-site doping as a strategy for tailoring BiFeO3 properties. in 4th Conference of The Serbian Society for Ceramic Materials. 2017;:95. https://hdl.handle.net/21.15107/rcub_rimsi_2330 .
Radojković, Aleksandar, Luković Golić, Danijela, Ćirković, Jovana, Dapčevć, Aleksandra, Pajić, Damir, Torić, Filip, Branković, Zorica, Branković, Goran, "B-site doping as a strategy for tailoring BiFeO3 properties" in 4th Conference of The Serbian Society for Ceramic Materials (2017):95, https://hdl.handle.net/21.15107/rcub_rimsi_2330 .