Tailoring the multiferroic behavior in BiFeO<sub>3</sub>nanostructures by Pb doping

Verma, Kuldeep Chand; Kotnala, R.K.

doi:10.1039/c6ra12949h

Cited by 50 publications

(35 citation statements)

References 74 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The P‐E loops exhibit ferroelectric character for the undoped BFO and dual doped BEFNO, BEFMO and BEFMoO. However, it is evident from Figure B that the leakage current density of BFO is very large compared to the doped samples and it is mainly attributed to the presence of point defects such as oxygen vacancies in BFO, which is responsible for the conductivity of BFO. The point defects such as oxygen vacancies govern the performance and reliability of functional devices and these point defects has the influence on the electric polarization and piezoelectric responses.…”

Section: Resultsmentioning

confidence: 96%

Tailoring the multiferroic properties of BiFeO₃ by co‐doping Er at Bi site with aliovalent Nb, Mn and Mo at Fe site

Lakshmi

Banu

2019

Int J Applied Ceramic Tech

View full text Add to dashboard Cite

Single phase multiferroic undoped BiFeO 3 notoriously suffers due to the poor spincharge coupling resulting in limitations to device applications. The present work focuses on the tailoring of its multiferroic and magnetoelectric coupling properties by synthesizing multiferroic Bi 0.95 Er 0.05 Fe 0.98 TM 0.02 O 3 (TM = Nb, Mn and Mo) ceramics. The ferroelectric, magnetic, current leakage measurements and magnetoelectric effect were investigated. XRD along with the Reitveld refinement results confirms that all the samples possess perovskite based rhombohedral structure and reveals that doping of (Er, Nb), (Er, Mn) and (Er, Mo) induced the crystallographic distortion in the BFO lattice and hence induced a variation in the bond lengths and bond angle.Dual doping significantly enhanced the electrical, magnetic properties and magnetoelectric coupling as compared to BiFeO 3 . Doping has lowered the leakage current by three to four orders compared to BFO. The lattice distortion, reduced leakage current and destruction of spin-cycloidal structure could be the origin for these improved features. The (Er, Nb) doped BiFeO 3 yields enhanced ferroelectric character with the maximum polarization value of 0.46 µC/cm 2 , maximum ME coupling of 0.22 mV/ cm at a magnetic field of 130 G, an improved magnetization with a remanance value of 0.0903 emu/g and the lowest leakage current density. K E Y W O R D Sco-doped BiFeO 3 , current leakage density, magnetoelectric effect, multiferroic ceramics, Reitveld refinement, Spin-spiral structure

show abstract

Section: Resultsmentioning

confidence: 96%

Tailoring the multiferroic properties of BiFeO₃ by co‐doping Er at Bi site with aliovalent Nb, Mn and Mo at Fe site

Lakshmi

Banu

2019

Int J Applied Ceramic Tech

View full text Add to dashboard Cite

show abstract

“…The multiferroic, DMS and ferrites materials might be synthesized by methods such as a sol-gel [17], chemical combustion [18], hydrothermal [19], metalloorganic decomposition (MOD) [20], conventional solid-state reaction [21], sol-gel precipitation [22], thermal evaporation [23], etc.…”

Section: Experimental Methodsmentioning

confidence: 99%

Ferromagnetism in Multiferroic BaTiO₃, Spinel MFe₂O₄ (M = Mn, Co, Ni, Zn) Ferrite and DMS ZnO Nanostructures

Verma¹,

Sharma²,

Goyal³

et al. 2020

Electromagnetic Materials and Devices

View full text Add to dashboard Cite

Multiferroic magnetoelectric material has significance for new design nanoscale spintronic devices. In single-phase multiferroic BaTiO 3 , the magnetism occurs with doping of transition metals, TM ions, which has partially filled d-orbitals. Interestingly, the magnetic ordering is strongly related with oxygen vacancies, and thus, it is thought to be a source of ferromagnetism of TM:BaTiO 3. The nanostructural MFe 2 O 4 (M = Mn, Co, Ni, Cu, Zn, etc.) ferrite has an inverse spinel structure, for which M 2+ ions in octahedral site and Fe 3+ ions are equally distributed between tetrahedral and octahedral sites. These antiparallel sublattices (cations M 2+ and Fe 3+ occupy either tetrahedral or octahedral sites) are coupled with O 2-ion due to superexchange interaction to form ferrimagnetic structure. Moreover, the future spintronic technologies using diluted magnetic semiconductors, DMS materials might have realized ferromagnetic origin. A simultaneous doping from TM and rare earth ions in ZnO nanoparticles could increase the antiferromagnetic ordering to achieve high-Tc ferromagnetism. The role of the oxygen vacancies as the dominant defects in doped ZnO that must involve bound magnetic polarons as the origin of ferromagnetism.

show abstract

“…Energy harvesting applications of multiferroics through photovoltaic has been a pioneering area of study by its own and the combination of other ferroic properties leads it to a new track [11][12][13][14]. BFO shows multiferroic responses at room temperature, with Curie temperature (1,103 K) and Neel temperature (647 K) [15]. BFO crystal exhibits rhombohedral distorted perovskite structure with R3c space group (a r = 3.96 Å and α r = 0.6 • ) [16].…”

Section: Introductionmentioning

confidence: 99%

Magnetic and Dielectric Properties of La and Ni Co-substituted BiFeO3 Nanoceramics

et al. 2020

View full text Add to dashboard Cite

The increasing plead for the realization of ultra-fast, miniaturized, compact, and ultra-low power consumption in electronic as well as spintronic devices has propelled the quest for novel multiferroic materials that efficiently enable voltage control of magnetism. The present work reports the phase stability, magnetic and dielectric responses of polycrystalline Bi 1−x La x Fe 1−y Ni y O 3 (0 ≤ x ≥ 0.2 and 0 ≤ y ≥ 0.2) multiferroic ceramics synthesized through a simplistic sol-gel approach. The maneuver substitutions of La at A − site of BiFeO 3 multiferroic eliminate the secondary phases formed owing to impurities. Rietveld refined XRD analysis reveals the structural transformation of the orthorhombic (Pbnm) phase as La substitution increases. However, an additional lattice distortion is induced as a result of the substitutions of Ni atoms at B − site. A substantial enhancement in magnetic and dielectric responses has been found in the co-doped (Ni and La) sample at both A and B − sites as a result of the size confinement of nano-crystallites, the exchange interaction between Fe 3+ and Ni 2+ ions, and corresponding variation in Fe-O-Fe bond angles. The dielectric constant has increased substantially in the low-frequency region with simultaneous substitutions of La and Ni at the sites of Bi and Fe, respectively. A careful observation of temperature-dependent magnetization curves (FC and ZFC) indicates a spin glass response with entangled ferromagnetic components. The experimental findings infer that the co-substitutions of La and Ni at their respective sites in Bi 1−x La x Fe 1−y Ni y O 3 (0 ≤ x ≥ 0.2 and 0 ≤ y ≥ 0.2) may significantly improve the ferromagnetic and dielectric responses of the studied nanoceramics.

show abstract

Tailoring the multiferroic behavior in BiFeO₃nanostructures by Pb doping

Abstract: Substituting Pb2+ for Bi3+ in BiFeO3 can induce lattice distortions and structural transitions to tune the lone-pair activity for ferroelectricity and neutralized oxygen vacancies to valence Fe2+/Fe3+ ions for ferromagnetism.

Cited by 50 publications

References 74 publications

Tailoring the multiferroic properties of BiFeO₃ by co‐doping Er at Bi site with aliovalent Nb, Mn and Mo at Fe site

Tailoring the multiferroic properties of BiFeO₃ by co‐doping Er at Bi site with aliovalent Nb, Mn and Mo at Fe site

Ferromagnetism in Multiferroic BaTiO₃, Spinel MFe₂O₄ (M = Mn, Co, Ni, Zn) Ferrite and DMS ZnO Nanostructures

Magnetic and Dielectric Properties of La and Ni Co-substituted BiFeO3 Nanoceramics

Contact Info

Product

Resources

About

Tailoring the multiferroic behavior in BiFeO3nanostructures by Pb doping

Abstract: Substituting Pb2+ for Bi3+ in BiFeO3 can induce lattice distortions and structural transitions to tune the lone-pair activity for ferroelectricity and neutralized oxygen vacancies to valence Fe2+/Fe3+ ions for ferromagnetism.

Cited by 50 publications

References 74 publications

Tailoring the multiferroic properties of BiFeO3 by co‐doping Er at Bi site with aliovalent Nb, Mn and Mo at Fe site

Tailoring the multiferroic properties of BiFeO3 by co‐doping Er at Bi site with aliovalent Nb, Mn and Mo at Fe site

Ferromagnetism in Multiferroic BaTiO3, Spinel MFe2O4 (M = Mn, Co, Ni, Zn) Ferrite and DMS ZnO Nanostructures

Magnetic and Dielectric Properties of La and Ni Co-substituted BiFeO3 Nanoceramics

Contact Info

Product

Resources

About

Tailoring the multiferroic behavior in BiFeO₃nanostructures by Pb doping

Tailoring the multiferroic properties of BiFeO₃ by co‐doping Er at Bi site with aliovalent Nb, Mn and Mo at Fe site

Tailoring the multiferroic properties of BiFeO₃ by co‐doping Er at Bi site with aliovalent Nb, Mn and Mo at Fe site

Ferromagnetism in Multiferroic BaTiO₃, Spinel MFe₂O₄ (M = Mn, Co, Ni, Zn) Ferrite and DMS ZnO Nanostructures