The improvement of ferroelectric properties of BiFeO3 ceramics by doping with La3+ and Eu3+
Аутори
Luković Golić, DanijelaRadojković, Aleksandar
Jović Orsini, Nataša
Dapčević, Aleksandra
Branković, Goran
Branković, Zorica
Конференцијски прилог (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
Bismuth ferrite is a unique multiferroic material that has a ferroelectric and antiferromagnetic order at room temperature. The rhombohedrally (R3c) distorted BiFeO3 perovskite structure is a result of relative cation displacement along [111] axis of the cubic perovskite structure and relative rotation of two oxygen octahedra in opposite directions around [111] axis [1]. The partial substitution of Bi3+ with rare-earth ions can affect the magnitude of lattice distortion and thus the value of electric polarization. The presence of undesirable secondary phases (Bi2Fe4O9 and Bi25FeO39) and structural point defects (oxygen and bismuth vacancies) in pure BiFeO3 lead to a high leakage current, which deteriorates its ferroelectric properties. Doping with rare-earth elements with large ionic radii is found to reduce the number of the structural defects and thus improve ferroelectric properties [2].
The influence of partial substitution of Bi3+ with La3+ and/or Eu3+ on ferroelectric properti...es of BiFeO3 ceramics was investigated. The Bi1-(x+y)LaxEuyFeO3 (x = 0, 0.025 0.05, 0.10; y = 0, 0.025, 0.05, 0.10) powders were synthesized by hydro-evaporation method, uniaxially pressed at 9 t/cm2 and sintered at 835 °C for 3 h. All the ceramic samples showed a rhombohedral structure, without presence of the secondary phases. Their morphology indicated the complete sintering under the given conditions. The grain size and grain shapes differed more depending on the dopant type and amount. The introduction of La3+ and/or Eu3+ at the site of Bi3+ led to such distortions within the rhombohedral lattice that resulted in much greater remnant electric polarization (Pr) in comparison with the undoped sample. The Bi1-(x+y)LaxEuyFeO3 ceramic samples with x+y = 0.10 showed approximately quadratic polarization vs. electric field P(E) hysteresis curves as well as significantly high values of pure ferroelectric polarization Pr, in large electric fields (100 – 140) kV/cm. The leakage currents of La3+/Eu3+-doped samples are mostly reduced, especially those doped only with Eu3+.
Кључне речи:
Multiferroic / Ferroelectric properties / Rare-earth substitutional ions / Bismuth ferrite ceramicsИзвор:
6th Conference of The Serbian Society for Ceramic Materials June 28-29, 2022, Belgrade, Serbia 6CSCS-2022, 2022, 77-Издавач:
- Institut za multidisciplinarna istraživanja, Kneza Višeslava 1, 11000 Belgrade, Serbia
Финансирање / пројекти:
- 0-3D наноструктуре за примену у електроници и обновљивим изворима енергије: синтеза, карактеризација и процесирање (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45007)
- 0-3D наноструктуре за примену у електроници и обновљивим изворима енергије: синтеза, карактеризација и процесирање (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45007)
Институција/група
Institut za multidisciplinarna istraživanjaTY - CONF AU - Luković Golić, Danijela AU - Radojković, Aleksandar AU - Jović Orsini, Nataša AU - Dapčević, Aleksandra AU - Branković, Goran AU - Branković, Zorica PY - 2022 UR - http://rimsi.imsi.bg.ac.rs/handle/123456789/2320 AB - Bismuth ferrite is a unique multiferroic material that has a ferroelectric and antiferromagnetic order at room temperature. The rhombohedrally (R3c) distorted BiFeO3 perovskite structure is a result of relative cation displacement along [111] axis of the cubic perovskite structure and relative rotation of two oxygen octahedra in opposite directions around [111] axis [1]. The partial substitution of Bi3+ with rare-earth ions can affect the magnitude of lattice distortion and thus the value of electric polarization. The presence of undesirable secondary phases (Bi2Fe4O9 and Bi25FeO39) and structural point defects (oxygen and bismuth vacancies) in pure BiFeO3 lead to a high leakage current, which deteriorates its ferroelectric properties. Doping with rare-earth elements with large ionic radii is found to reduce the number of the structural defects and thus improve ferroelectric properties [2]. The influence of partial substitution of Bi3+ with La3+ and/or Eu3+ on ferroelectric properties of BiFeO3 ceramics was investigated. The Bi1-(x+y)LaxEuyFeO3 (x = 0, 0.025 0.05, 0.10; y = 0, 0.025, 0.05, 0.10) powders were synthesized by hydro-evaporation method, uniaxially pressed at 9 t/cm2 and sintered at 835 °C for 3 h. All the ceramic samples showed a rhombohedral structure, without presence of the secondary phases. Their morphology indicated the complete sintering under the given conditions. The grain size and grain shapes differed more depending on the dopant type and amount. The introduction of La3+ and/or Eu3+ at the site of Bi3+ led to such distortions within the rhombohedral lattice that resulted in much greater remnant electric polarization (Pr) in comparison with the undoped sample. The Bi1-(x+y)LaxEuyFeO3 ceramic samples with x+y = 0.10 showed approximately quadratic polarization vs. electric field P(E) hysteresis curves as well as significantly high values of pure ferroelectric polarization Pr, in large electric fields (100 – 140) kV/cm. The leakage currents of La3+/Eu3+-doped samples are mostly reduced, especially those doped only with Eu3+. PB - Institut za multidisciplinarna istraživanja, Kneza Višeslava 1, 11000 Belgrade, Serbia C3 - 6th Conference of The Serbian Society for Ceramic Materials June 28-29, 2022, Belgrade, Serbia 6CSCS-2022 T1 - The improvement of ferroelectric properties of BiFeO3 ceramics by doping with La3+ and Eu3+ SP - 77 UR - https://hdl.handle.net/21.15107/rcub_rimsi_2320 ER -
@conference{ author = "Luković Golić, Danijela and Radojković, Aleksandar and Jović Orsini, Nataša and Dapčević, Aleksandra and Branković, Goran and Branković, Zorica", year = "2022", abstract = "Bismuth ferrite is a unique multiferroic material that has a ferroelectric and antiferromagnetic order at room temperature. The rhombohedrally (R3c) distorted BiFeO3 perovskite structure is a result of relative cation displacement along [111] axis of the cubic perovskite structure and relative rotation of two oxygen octahedra in opposite directions around [111] axis [1]. The partial substitution of Bi3+ with rare-earth ions can affect the magnitude of lattice distortion and thus the value of electric polarization. The presence of undesirable secondary phases (Bi2Fe4O9 and Bi25FeO39) and structural point defects (oxygen and bismuth vacancies) in pure BiFeO3 lead to a high leakage current, which deteriorates its ferroelectric properties. Doping with rare-earth elements with large ionic radii is found to reduce the number of the structural defects and thus improve ferroelectric properties [2]. The influence of partial substitution of Bi3+ with La3+ and/or Eu3+ on ferroelectric properties of BiFeO3 ceramics was investigated. The Bi1-(x+y)LaxEuyFeO3 (x = 0, 0.025 0.05, 0.10; y = 0, 0.025, 0.05, 0.10) powders were synthesized by hydro-evaporation method, uniaxially pressed at 9 t/cm2 and sintered at 835 °C for 3 h. All the ceramic samples showed a rhombohedral structure, without presence of the secondary phases. Their morphology indicated the complete sintering under the given conditions. The grain size and grain shapes differed more depending on the dopant type and amount. The introduction of La3+ and/or Eu3+ at the site of Bi3+ led to such distortions within the rhombohedral lattice that resulted in much greater remnant electric polarization (Pr) in comparison with the undoped sample. The Bi1-(x+y)LaxEuyFeO3 ceramic samples with x+y = 0.10 showed approximately quadratic polarization vs. electric field P(E) hysteresis curves as well as significantly high values of pure ferroelectric polarization Pr, in large electric fields (100 – 140) kV/cm. The leakage currents of La3+/Eu3+-doped samples are mostly reduced, especially those doped only with Eu3+.", publisher = "Institut za multidisciplinarna istraživanja, Kneza Višeslava 1, 11000 Belgrade, Serbia", journal = "6th Conference of The Serbian Society for Ceramic Materials June 28-29, 2022, Belgrade, Serbia 6CSCS-2022", title = "The improvement of ferroelectric properties of BiFeO3 ceramics by doping with La3+ and Eu3+", pages = "77", url = "https://hdl.handle.net/21.15107/rcub_rimsi_2320" }
Luković Golić, D., Radojković, A., Jović Orsini, N., Dapčević, A., Branković, G.,& Branković, Z.. (2022). The improvement of ferroelectric properties of BiFeO3 ceramics by doping with La3+ and Eu3+. in 6th Conference of The Serbian Society for Ceramic Materials June 28-29, 2022, Belgrade, Serbia 6CSCS-2022 Institut za multidisciplinarna istraživanja, Kneza Višeslava 1, 11000 Belgrade, Serbia., 77. https://hdl.handle.net/21.15107/rcub_rimsi_2320
Luković Golić D, Radojković A, Jović Orsini N, Dapčević A, Branković G, Branković Z. The improvement of ferroelectric properties of BiFeO3 ceramics by doping with La3+ and Eu3+. in 6th Conference of The Serbian Society for Ceramic Materials June 28-29, 2022, Belgrade, Serbia 6CSCS-2022. 2022;:77. https://hdl.handle.net/21.15107/rcub_rimsi_2320 .
Luković Golić, Danijela, Radojković, Aleksandar, Jović Orsini, Nataša, Dapčević, Aleksandra, Branković, Goran, Branković, Zorica, "The improvement of ferroelectric properties of BiFeO3 ceramics by doping with La3+ and Eu3+" in 6th Conference of The Serbian Society for Ceramic Materials June 28-29, 2022, Belgrade, Serbia 6CSCS-2022 (2022):77, https://hdl.handle.net/21.15107/rcub_rimsi_2320 .