Effect of temperature and frequency on electrical properties of composite multiferroic of lead titanate and strontium hexaferrite (PbTiO3 – SrFe12O19)

Singh, Ajay; Suri, Shivani; Kumar, Parveen; Kaur, Balwinder; Thakur, Anil; Singh, Vishal

doi:10.1016/j.jallcom.2018.06.071

Cited by 20 publications

(4 citation statements)

References 49 publications

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“…At low frequency, the appearance of a plateau region is related to the long-distance migration of Li ions. Also, the reduced Z ′ with enhancement of temperature reveals the existence of a negative temperature coefficient of resistance (NTCR) in LMO. , As frequency increases, Z ′ shows a gradual decrease in tendency because of the capacitor admittance caused by short-range migration of Li ions and hopping of small polarons. As shown in Figure b, two relaxation peaks can be found in Z ″ as a function of frequency, which are caused by short-range migration of Li ions and hopping of small polarons.…”

Section: Resultsmentioning

confidence: 99%

Long-Range and Short-Range Transport Dynamics of Li Ions in LiMn₂O₄

Zheng

Wang

et al. 2020

J. Phys. Chem. C

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Investigation of lithium ion transport between different crystallographic sites in different phase structures has been regarded as a challenging diffraction issue. In this work, isothermal dielectric spectroscopy and the electric modulus of LiMn 2 O 4 (LMO) were adopted to reveal Li-ion transport behavior. Dielectric and electric modulus spectra show three thermally activated processes: (i) enhanced mid-frequency dielectric permittivity above 133 K contributed by the short-range migration of Li ions, (ii) high-frequency dielectric relaxation associated with hopping of small polarons, and (iii) low-frequency giant dielectric loss (dc conductivity) caused by the long-range migration of Li ions at high temperature. In addition, an obvious change of dielectric permittivity around 280 K happens at structural transition from cubic to tetragonal of LMO. Furthermore, it was found that the short-range mobility of Li ions and hopping of small polarons lead to the variation of β in the Kohlrausch−Williams−Watts (KWW) function of the electric modulus. Thus, our work provides a revealing insight into the electrical transport mechanism and migration dynamics of Li ions in LMO.

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Section: Resultsmentioning

confidence: 99%

Long-Range and Short-Range Transport Dynamics of Li Ions in LiMn₂O₄

Zheng

Wang

et al. 2020

J. Phys. Chem. C

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“…This space charge comes from mobile ions which in the present case could be the oxygen vacancies. 17,18 Figure 5 exhibits frequency and temperature dependence of imaginary part of impedance (Z 00 ) for KNN solid-solutions. In low-temperature/frequency range, Z 00 has very high value for all the compositions which decreases with the rise in frequency and attains low values.…”

Section: Resultsmentioning

confidence: 99%

Comprehensive investigation of structural, dielectric and local piezoelectric properties of KNN ceramics

et al. 2019

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In this research paper, we utilized the traditional high-temperature solid-state reaction method to fabricate the K[Formula: see text]Na[Formula: see text]NbO3, K[Formula: see text]Na[Formula: see text]NbO3 and K[Formula: see text]Na[Formula: see text]NbO3 (abbreviated as KNN-1, KNN-2, and KNN-3, respectively) lead-free ion deficient ceramics for understanding the influence of ionic deficiency on the crystalline structure and dielectric/piezoelectric properties of the samples. X-ray diffraction patterns of these samples exhibited a perovskite tetragonal phase. Dielectric anomalies around 287∘C and 471∘C were identified as ferroelectric to ferroelectric and ferroelectric to paraelectric-transition temperatures for KNN-2 at 1[Formula: see text]kHz. It was found that the composition KNN-2 exhibit relatively high Curie temperature i.e., 471∘C. The conductivity plots confirm that the activation energies are frequency-dependent. The impedance behavior in our ceramic samples can be analyzed with the bulk/grain effect. The slope of [Formula: see text] with temperature shows negative temperature coefficient of resistance (NTCR) type behavior in proposed KNN ceramics material.

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“…It has been demonstrated that the magnetic characteristics of CuFe 2 O 4 (CF) may be improved as it is doped with different elements such as Co, Ba, and Ni [5–7] and substituted with rare earth elements like Gd, Pr, Er, and Dy [8] . Similar to this, ferrite‐based composites, like polyaniline and polypyrene combined with ferrites are also used to create multifunctional materials for the use in sensors and electronic devices [9] …”

Section: Introductionmentioning

confidence: 97%

“…[8] Similar to this, ferrite-based composites, like polyaniline and polypyrene combined with ferrites are also used to create multifunctional materials for the use in sensors and electronic devices. [9] To obtain the single-phase crystalline structure and high homogeneity, we addressed here the Zn-substituted Mn 0.92 Cu 0.08-y Zn y Fe 2 O 4 (Y = 0.02-0.08) (MCZF) for optical, magnetic, and structural characteristics by employing the hydrothermal method and conventional heating at 473 K. As a matter of fact, the hydrothermal process can provide nanofibers with anisotropic characteristics and well-developed structures that correspond to specific crystallographic geometries, such as cubes, plates, and other shapes. It is anticipated that the Zn substituted manganese copper ferrite will exhibit a decrease in magnetization (M s ) as a result of becoming superparamagnetic.…”

Section: Introductionmentioning

confidence: 99%

Magnetic, Optical, Electrical and Antimicrobial Properties of MnCuZnFe₂O₄ Nanoparticles

Surendra Babu,

Bhonsle,

H.V.

et al. 2024

ChemistrySelect

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The Mn0.92Cu0.08‐yZnyFe2O4 (y=0.02, 0.04, 0.06 and 0.08) nanoparticles (MCZF NPs) were synthesized via the hydrothermal process at low operating temperature. The MCZF system generated a cubic spinel structure as seen by the X‐ray diffraction patterns. The average crystallite size was observed to be increasing from 25 to 30 nm. The broad (γ1) and narrow (γ2) absorption bands were seen in FTIR spectra and the cation distributions at tetrahedral (A) and octahedral (B) sites, respectively, was indicated. The surface morphology was analyzed using electron microscopy. Clarification was provided for the dependence of the optical bandgap shift (Eg~1.96–2.15 eV) on the concentration of substituent. The superparamagnetic nature of MCZF can be advantageous for biomedical applications and it was demonstrated by the magnetization versus applied magnetic field (M−H) loops. Small values of remanence magnetization (Mr) and coercivity (Hc) were found using magnetization versus magnetic field (M−H) curves at y=0.02, 0.04, 0.06, and 0.08. This proved that MCZF NPs exhibited the superparamagnetic behavior. The cation distribution at two sublattices was also estimated using a two‐sublattice model. The greatest zone of inhibition in an antibacterial study of MCZF (produced by the green method) was 10.8 mm for Pseudomonosa aeruginosa and 9.4 mm for Staphylococcus aureus.

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Effect of temperature and frequency on electrical properties of composite multiferroic of lead titanate and strontium hexaferrite (PbTiO3 – SrFe12O19)

Cited by 20 publications

References 49 publications

Long-Range and Short-Range Transport Dynamics of Li Ions in LiMn₂O₄

Long-Range and Short-Range Transport Dynamics of Li Ions in LiMn₂O₄

Comprehensive investigation of structural, dielectric and local piezoelectric properties of KNN ceramics

Magnetic, Optical, Electrical and Antimicrobial Properties of MnCuZnFe₂O₄ Nanoparticles

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Effect of temperature and frequency on electrical properties of composite multiferroic of lead titanate and strontium hexaferrite (PbTiO3 – SrFe12O19)

Cited by 20 publications

References 49 publications

Long-Range and Short-Range Transport Dynamics of Li Ions in LiMn2O4

Long-Range and Short-Range Transport Dynamics of Li Ions in LiMn2O4

Comprehensive investigation of structural, dielectric and local piezoelectric properties of KNN ceramics

Magnetic, Optical, Electrical and Antimicrobial Properties of MnCuZnFe2O4 Nanoparticles

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Product

Resources

About

Long-Range and Short-Range Transport Dynamics of Li Ions in LiMn₂O₄

Long-Range and Short-Range Transport Dynamics of Li Ions in LiMn₂O₄

Magnetic, Optical, Electrical and Antimicrobial Properties of MnCuZnFe₂O₄ Nanoparticles