Multifunctional KBiFe2O5 thick film: advances in functional properties

Jalaja, M. A.; Dutta, Soma

doi:10.1007/s10854-020-03569-3

Cited by 3 publications

(3 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Ferroelectricity in KBFO is attributed to displacements of K + and Bi 3+ ions. Magnetoelectric, magnetodielectric, and optical properties of bulk KBFO [4][5][6][7][8] and KBFO thin films showing well-saturated polarization hysteresis loops [9][10][11] have been considered in the last few years. The band gap value of KBFO thin films with orthorhombic structure is found to be 1.67 eV [10], i.e., it is larger than in bulk KBFO and is appropriate for visible light absorption.…”

Section: Introductionmentioning

confidence: 99%

“…Ferroelectricity in KBFO is attributed to displacements of K

and Bi

ions. Magnetoelectric, magnetodielectric, and optical properties of bulk KBFO [ 4 , 5 , 6 , 7 , 8 ] and KBFO thin films showing well-saturated polarization hysteresis loops [ 9 , 10 , 11 ] have been considered in the last few years. The band gap value of KBFO thin films with orthorhombic structure is found to be 1.67 eV [ 10 ], i.e., it is larger than in bulk KBFO and is appropriate for visible light absorption.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Multiferroic Properties of Co, Ru, and La Ion Doped KBiFe2O5

Apostolov,

Apostolova,

Wesselinowa

2023

Materials

View full text Add to dashboard Cite

The magnetic, electric, dielectric, and optical (band gap) properties of ion doped multiferroic KBiFe2O5 (KBFO) have been systematically investigated utilizing a microscopic model and the Green’s function theory. Doping with Co at the Fe site and Ru at the Bi site induces changes in magnetization, coercive field, and band gap energy. Specifically, an increase in magnetization is observed, while the coercive field and band gap energy decrease. This behavior is attributed to the distinct ionic radii of the doped and host ions, leading to alterations in the exchange interaction constants. The temperature dependence of the polarization P reveals a distinctive kink at the Neel temperature TN, which shifts to higher temperatures with an increase in the applied magnetic field h. Furthermore, doping with Ru and La leads to an increase in polarization. The temperature dependence of the dielectric constant exhibits two peaks at the Neel temperature TN and the Curie temperature TC. Notably, these peaks diminish with increasing frequency. Additionally, the dielectric constant demonstrates a decrease with the rise in the applied magnetic field h. This study sheds light on the intricate interplay between ion doping, structural modifications, and multifunctional properties in KBFO, offering valuable insights into the underlying mechanisms governing its behavior across various physical domains.

show abstract

Section: Introductionmentioning

confidence: 99%

“…Ferroelectricity in KBFO is attributed to displacements of K

and Bi

Section: Introductionmentioning

confidence: 99%

Multiferroic Properties of Co, Ru, and La Ion Doped KBiFe2O5

Apostolov,

Apostolova,

Wesselinowa

2023

Materials

View full text Add to dashboard Cite

show abstract

“…The synthesis routes studied most frequently in the literature for KBFO are citrate combustion, [17][18][19] sol-gel, 16,[20][21][22][23][24] solid-state reaction, 14,15,[25][26][27][28] hydrothermal, 1,29,30 and solution combustion. 31 The literature still lacks an understanding of the phase formation, thermal stability, and homogeneity of KBFO powder formed by the polymeric precursor (Pechini) synthesis route.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the thermal stability and optical properties of KBiFe₂O₅perovskite obtained by a polymeric precursor method

Verza

Silva

Morelli

2022

Int J Applied Ceramic Tech

View full text Add to dashboard Cite

The solar cells are the most prominent devices to generate energy from sunlight, however, one of the main factors limiting the efficiency of photovoltaic conversion is the recombination of charge carriers in their active layer, which is generated by the inhomogeneity of the material that constitutes this layer. KBiFe2O5 is a perovskite with a high potential to be applied in the active layer of photovoltaic devices, however, it suffers from poor homogeneity during its synthesis, which is caused by the volatilization of K and Bi of its composition and, consequently, leads to the formation of secondary phases, which can sequester the charge carriers and decrease the efficiency of photovoltaic conversion. Thus, our objective is to evaluate the homogeneity of the powders obtained by the polymeric precursor method, its thermal stability until the formation of secondary phases, and the optical properties. With elemental mapping, it was possible to verify that the powder obtained was highly homogeneous and the band gap of 1.74 eV is within the optimal range for applications involving sunlight. Thus, it was possible to verify that this synthesis method generates highly homogeneous powders and at the temperatures employed does not undergo volatilization of K and Bi.

show abstract

Theoretical Study of Magnetization and Electrical Conductivity of Ion‐Doped KBiFe₂O₅ Nanoparticles

Apostolov,

Apostolova,

Wesselinowa

2024

Physica Status Solidi (b)

View full text Add to dashboard Cite

The electrical conductivity σ and magnetization M of (KBFO) nanoparticles (NPs) are systematically examined using a microscopic model and Green's function theory. KBFO is characterized by a narrow bandgap and relatively weak electrical conductivity σ, which presents a problem in carrier transportation and collection. Therefore, ways to enhance σ are found. The first is reducing the NP size. The second one is doping at the Fe and Bi sites with different ions which cause a compressive strain, that is, their ionic radius is smaller than that of the host ion. It is shown that doping with Al at the Fe site as well as with Ru or La ions at the Bi site leads to enhancing the electrical conductivity σ. The magnetization M increases with increasing concentration of all dopants.

show abstract

Multifunctional KBiFe2O5 thick film: advances in functional properties

Cited by 3 publications

References 30 publications

Multiferroic Properties of Co, Ru, and La Ion Doped KBiFe2O5

Multiferroic Properties of Co, Ru, and La Ion Doped KBiFe2O5

Analysis of the thermal stability and optical properties of KBiFe₂O₅perovskite obtained by a polymeric precursor method

Theoretical Study of Magnetization and Electrical Conductivity of Ion‐Doped KBiFe₂O₅ Nanoparticles

Contact Info

Product

Resources

About

Multifunctional KBiFe2O5 thick film: advances in functional properties

Cited by 3 publications

References 30 publications

Multiferroic Properties of Co, Ru, and La Ion Doped KBiFe2O5

Multiferroic Properties of Co, Ru, and La Ion Doped KBiFe2O5

Analysis of the thermal stability and optical properties of KBiFe2O5perovskite obtained by a polymeric precursor method

Theoretical Study of Magnetization and Electrical Conductivity of Ion‐Doped KBiFe2O5 Nanoparticles

Contact Info

Product

Resources

About

Analysis of the thermal stability and optical properties of KBiFe₂O₅perovskite obtained by a polymeric precursor method

Theoretical Study of Magnetization and Electrical Conductivity of Ion‐Doped KBiFe₂O₅ Nanoparticles