Effect of holmium (Ho) partial substitution in structure and ferroelectric properties of bismuth ferrites (BFO)

Nair, Soumya G; Satapathy, Jyotirmayee; Kumar, Naresh

doi:10.1016/j.jallcom.2021.162599

Cited by 19 publications

(8 citation statements)

References 19 publications

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“…[26] We reported the impact of holmium substitution to enhance ferroelectricity where 20% holmium-doped BFO is found to enhance ferroelectricity comparatively. [8] This is attributed to better structural ordering, that is, suppression in the volatilization of bismuth and thus Fe 2þ ion formation as well as better grain growth and orientation as reported earlier. [3,16] With manganese codoping, the shapes become oval with increasing dopant concentration.…”

Section: Impedance Analysissupporting

confidence: 60%

“…[ 3 ] Many works have reported the enhancement of multiferroic properties, in which Bi sites were replaced by rare‐earth ions (Gd

^{3 +}

, La

^{3 +}

, Nd

^{3 +}

, Sm

^{3 +}

) or Fe sites were replaced by transition metal ions (Ni

^{2 +}

, Co

^{3 +}

). [ 1,8,9 ] For example, substitution of isovalent (such as Mn, Cr) and aliovalent (such as Ti) elements at the B site has proved an efficient way to reduce the leakage current density. [ 10 ] Similarly doping and codoping can have a significant impact on its optical properties, leading to changes in its bandgap, absorption spectra, and photoluminescence by modifying its electronic band structure and defect levels.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Structural, Spectroscopic, and Electrical Properties of (Ho, Mn)‐Codoped Bismuth Ferrites Synthesized Through Solid‐State Route

Nair,

Satapathy

2023

Physica Status Solidi (a)

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Bismuth Ferrites (BiFeO3) are popularly known as BFOs and have a potential application at room temperature in present‐day material science and ceramic industry due to their multiferroic and optical properties. Synthesis methods, temperature treatments, and doping are effective for tuning the structural and multiferroic properties of BFO, among which rare earth metals in Bi‐Site and transition metals in Fe‐site have shown interesting results. This work explores the synthesis and characterizations of (holmium, manganese) co‐doped BFOs where solid state synthesis route and some electrical analyses are the novel studies attempted here. XRD results explain the structural transition from rhombohedral to mixed phase ordering. Grain formation and the elemental concentrations are studied using Scanning Electron Microscopy (SEM), and Energy Dispersive ray spectra (EDAX). Electrical analysis such as dielectric behaviour with respect to frequency and temperature impedance analysis have been studied in detail. Polarization vs. Electric field (PE) hysteresis loop shows the ferroelectric nature of the co‐doped sample with lossy nature and reduced remnant polarization with doping. The dielectric anomalies with frequency and temperature are analyzed in detail and antiferromagnetic transition around Neel temperature is discussed.This article is protected by copyright. All rights reserved.

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Section: Impedance Analysissupporting

confidence: 60%

“…[ 3 ] Many works have reported the enhancement of multiferroic properties, in which Bi sites were replaced by rare‐earth ions (Gd

^{3 +}

, La

^{3 +}

, Nd

^{3 +}

, Sm

^{3 +}

) or Fe sites were replaced by transition metal ions (Ni

^{2 +}

, Co

^{3 +}

Section: Introductionmentioning

confidence: 99%

Structural, Spectroscopic, and Electrical Properties of (Ho, Mn)‐Codoped Bismuth Ferrites Synthesized Through Solid‐State Route

Nair,

Satapathy

2023

Physica Status Solidi (a)

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“…Chemical substitution at the Bi/Fe sites of BFO with appropriate ionic radius elements has been reported to produce a stable perovskite phase. A‐site doping with rare‐earth minerals such as La, [ 16 ] Pr, [ 17 ] Sm, [ 18 ] Dy, [ 19 ] Gd, [ 20 ] Eu, [ 21 ] Tb, [ 22 ] and Ho [ 23 ] can significantly alter particle size, lattice structure, surface morphology, and the number of oxygen vacancies, improving the ferromagnetic (FM) and FE properties of BFO whereas the B‐site doping with transition‐metal elements such as Mn, [ 24 ] Ni, [ 25 ] and Co [ 26 ] can reduce leakage current, improving electric polarization and magnetization in MF. Furthermore, by replacing Bi 3+ and Fe 3+ ions with (Sm, Ba, La, Gd, Y, Eu, Tb) and (Co, Ti, and Mn) respectively, the FM characteristics of BFO can be improved.…”

Section: Introductionmentioning

confidence: 99%

“…Chemical substitution at the Bi/Fe sites of BFO with appropriate ionic radius elements has been reported to produce a stable perovskite phase. A-site doping with rare-earth minerals such as La, [16] Pr, [17] Sm, [18] Dy, [19] Gd, [20] Eu, [21] Tb, [22] and Ho [23] can significantly alter particle size, lattice structure, surface morphology, and the number of oxygen vacancies, improving the…”

mentioning

confidence: 99%

Enhancement of Multiferroic and Optical Properties in BiFeO₃ Due to Different Exchange Interactions Between Transition and Rare Earth Ions

Kumari

Anand

Alam

et al. 2023

Physica Status Solidi (b)

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An experimental analysis of the Bi0.90Tb0.1Fe0.90Mn0.1O3 system synthesized via the solid‐state method is presented in this report. UV–visible measurements are carried out and a smaller bandgap (i.e., semiconductor‐type behavior) is obtained. The structural phase of the present system is analyzed with X‐ray diffraction and neutron diffraction measurement. Structural‐phase analysis reveals that the system contains two nuclear phases (rhombohedral structure [R3c space group] with orthorhombic [Pn21a space group]). Moreover, also more bending in the bond angle is found, and the existence of a magnetic phase with a nuclear phase for the Bi0.90Tb0.1Fe0.90Mn0.1O3 system is also confirmed by neutron diffraction. The magnetic moment versus temperature (M–T) curve demonstrates that the system's Néel transition temperature is at 568 K. The magnetization data show enhancement in the magnetic property by displaying the weak ferromagnetic‐type behavior at room temperature in the magnetic field versus magnetic moment (M–H) curve as compared to the parent compound. From dielectric measurement, the dielectric constant increases while the loss decreases.

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“…For instance, the modification of the ferroelectric and magnetic properties of transition metal- and rare earth-doped BiFeO 3 is well documented in previous reports [ 18 , 19 , 20 , 21 , 22 ]. Holmium-doped BiFeO 3 samples showed good ferroelectric performance as compared to undoped ones [ 23 ]. Similarly, Nd-doped BiFeO 3 thin films for random access memory applications were successfully grown [ 24 ].…”

Section: Introductionmentioning

confidence: 99%

Tunable Optical and Multiferroic Properties of Zirconium and Dysprosium Substituted Bismuth Ferrite Thin Films

et al. 2022

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This work presents optical and multiferroic properties of bismuth ferrite thin films that are affected by zirconium and dysprosium substitution. Non-centrosymmetric BiFeO3,Bi0.95Zr0.05FeO3, and Bi0.95Dy0.05FeO3 thin films were coated on Pt/TiO2/SiO2/Si substrates using the spin coating method. The crystal structure, optical properties, microstructural, ferromagnetic, and ferroelectric properties of doped bismuth ferrite thin films were systematically investigated. From the XRD patterns, all the prepared thin films matched well with the rhombohedral structure with R3c space group with no observed impurity phases. The average crystallite size of the bismuth ferrite thin films were between 35 and 47 nm, and the size depended on the type of dopant. The determined energy band gap values of BiFeO3, Bi0.95Dy0.05FeO3, and Bi0.95Zr0.05FeO3 thin films were 2.32 eV, 2.3 eV, and 2 eV, respectively. Doping of Dy and Zr at the Bi site led to reduced surface roughness. The prepared thin films exhibited enhanced ferromagnetic and ferroelectric properties. The remnant magnetization of Zr-doped BiFeO3 was greater than that of the BiFeO3 and Dy-doped BiFeO3 thin films. From the obtained results, it was concluded that Zr-doped BiFeO3 thin films are suitable for solar cell fabrication.

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Effect of holmium (Ho) partial substitution in structure and ferroelectric properties of bismuth ferrites (BFO)

Cited by 19 publications

References 19 publications

Structural, Spectroscopic, and Electrical Properties of (Ho, Mn)‐Codoped Bismuth Ferrites Synthesized Through Solid‐State Route

Structural, Spectroscopic, and Electrical Properties of (Ho, Mn)‐Codoped Bismuth Ferrites Synthesized Through Solid‐State Route

Enhancement of Multiferroic and Optical Properties in BiFeO₃ Due to Different Exchange Interactions Between Transition and Rare Earth Ions

Tunable Optical and Multiferroic Properties of Zirconium and Dysprosium Substituted Bismuth Ferrite Thin Films

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Effect of holmium (Ho) partial substitution in structure and ferroelectric properties of bismuth ferrites (BFO)

Cited by 19 publications

References 19 publications

Structural, Spectroscopic, and Electrical Properties of (Ho, Mn)‐Codoped Bismuth Ferrites Synthesized Through Solid‐State Route

Structural, Spectroscopic, and Electrical Properties of (Ho, Mn)‐Codoped Bismuth Ferrites Synthesized Through Solid‐State Route

Enhancement of Multiferroic and Optical Properties in BiFeO3 Due to Different Exchange Interactions Between Transition and Rare Earth Ions

Tunable Optical and Multiferroic Properties of Zirconium and Dysprosium Substituted Bismuth Ferrite Thin Films

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Enhancement of Multiferroic and Optical Properties in BiFeO₃ Due to Different Exchange Interactions Between Transition and Rare Earth Ions