Enhanced dielectric and optical properties in Al-substituted KBiFe2O5

Sahoo, Payala; Pati, Anupama; Ray, Sujata Kumari; Sahoo, Aditi; Dash, Sukalyan

doi:10.1016/j.matpr.2022.04.991

Cited by 6 publications

(5 citation statements)

References 12 publications

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“…It can be seen that the Neel temperature T N also increases when increasing the concentration of the dopant Co. Let us emphasize that T N can reach a certain x value and Curie temperature T C and can exceed it. A similar enhanced magnetization M is observed by Sahoo et al [18] in Al-doped KBFO, where again a compressive strain appears and could be explained by our model and method.…”

Section: Numerical Results and Discussionsupporting

confidence: 89%

“…Chandra et al [ 23 ] reported that the study of the temperature dependence of the dielectric constant of Ho-doped KBFO shows two transitions, at

and

. The temperature dependence of

of Al doped KBFO was investigated for T = 300–773 K by Sahoo et al [ 18 ] which exhibits a small anomaly at the Neel temperature

∼550 K.…”

Section: Numerical Results and Discussionmentioning

confidence: 99%

“…Moreover, by Co doping there is a good quantitative agreement with the experimental data of Chandrakanta et al [ 20 ], which is evidence that the proposed model and the used method of the Green’s functions are appropriate. A decrease in the band gap energy

is reported also by doping with other ions, for example Al [ 18 ], and La [ 13 ]. It must be mentioned that Rai et al [ 14 ] reported an increase in magnetization M and band gap energy

for Y ion doped KBFO.…”

Section: Numerical Results and Discussionmentioning

confidence: 99%

“…The doping effects with different ions (La, Y, Co, Ho, Ru, and Al) on structural, magnetic, electrical, and optical properties of KBFO have also been investigated [ 13 , 14 , 15 , 16 , 17 , 18 ]. The doping ions can change the properties of the compound.…”

Section: Introductionmentioning

confidence: 99%

“…The doping ions can change the properties of the compound. By doping with Co or Al (at the Fe site) and with La, Y or Ru (at the Bi site), the magnetization increases (attributed to the modification of spin canting), whereas the band gap decreases [ 13 , 15 , 16 , 18 ]. The decrease in band gap can be due to the tilting of the Fe-O tetrahedral structure of Co-doped KBFO.…”

Section: Introductionmentioning

confidence: 99%

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

Apostolov,

Apostolova,

Wesselinowa

2023

Materials

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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.

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Section: Numerical Results and Discussionsupporting

confidence: 89%

“…Chandra et al [ 23 ] reported that the study of the temperature dependence of the dielectric constant of Ho-doped KBFO shows two transitions, at

and

. The temperature dependence of

of Al doped KBFO was investigated for T = 300–773 K by Sahoo et al [ 18 ] which exhibits a small anomaly at the Neel temperature

∼550 K.…”

Section: Numerical Results and Discussionmentioning

confidence: 99%

is reported also by doping with other ions, for example Al [ 18 ], and La [ 13 ]. It must be mentioned that Rai et al [ 14 ] reported an increase in magnetization M and band gap energy

for Y ion doped KBFO.…”

Section: Numerical Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

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

Apostolov,

Apostolova,

Wesselinowa

2023

Materials

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

Apostolov,

Apostolova,

Wesselinowa

2024

Physica Status Solidi (b)

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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.

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