Dielectric properties and magnetic behavior OF Gd3+ substituted M-type SrFe12O19 nanoferrites by auto combustion method using urea and citric acid mixtures as a dual fuel

Lakshmikantha, J.; Krishnamurthy, G.; Nagabhushan, B.M.; Melagiriyappa, E.

doi:10.1016/j.jssc.2022.123465

Cited by 11 publications

(2 citation statements)

References 54 publications

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“…It is worth noting that the lattice parameter a exhibited minimal alteration in comparison to the c parameter, in line with the observed behavior of other hexagonal structures, where significant modifications in the c parameter were observed in relation to the lattice parameter a . 43–46 The c / a ratios with varying Gd–Ni concentrations ( x and y ) are in the range of 3.81 to 3.86 and show the formation of a hexagonal structure. To determine the formation of a hexagonal structure type, we utilize the c / a ratio (>3.98) by Verstegen-and-Stevel's law.…”

Section: Resultsmentioning

confidence: 98%

Influence of Gd and Ni doping on the structural, morphological, and magnetic properties of M-type calcium hexaferrite

Chaurasiya,

Kumar,

Lone

et al. 2024

New J. Chem.

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Section: Resultsmentioning

confidence: 98%

Influence of Gd and Ni doping on the structural, morphological, and magnetic properties of M-type calcium hexaferrite

Chaurasiya,

Kumar,

Lone

et al. 2024

New J. Chem.

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“…[7] To enhance ferrites' performance, researchers have explored various avenues, such as adjusting sintering temperature, modifying the gas atmosphere, or employing composites with other materials. [8][9][10][11][12] It has been observed that doping with transition-metal ions or similar-sized rareearth ions can bring about significant alterations in ferrites' properties. The magnetic characteristics of doped magnetic nanoferrites hinge on the composition, concentration, morphology, particle size, and synthesis techniques of the doping elements.…”

Section: Introductionmentioning

confidence: 99%

Structural Elucidation and Evaluation of Magnetic and Dielectric Properties of Lu–La Co‐substituted M‐Type Hexagonal Ferrites Synthesized by Chemical Co‐precipitation Method

Wang,

Han

2024

Physica Status Solidi (a)

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In this research, LuxLaySr1–yFe12–xO19, an M‐type strontium ferrite, is synthesized using the coprecipitation method with precursor chemicals. The samples undergo analysis for structure, morphology, and elemental composition through X‐ray diffraction (XRD) and scanning electron microscopy (SEM). Magnetic and dielectric properties are determined using a vibrating sample magnetometer (VSM) and a dielectric property measurement instrument (LCR), respectively. The primary objective of this study is to enhance the dielectric performance of the samples through rare‐earth element doping. The XRD analysis reveals that the samples display a hexagonal single‐phase magnetoplumbite crystal structure. SEM micrographs illustrate a regular hexagonal structure of the grains. VSM analysis affirms LuxLaySr1–yFe12–xO19 as a hard magnetic material with a high coercivity. As the rare‐earth element content increases, the coercivity of the samples significantly decrease from 2065.3 to 910.3 Oe. Dielectric property analysis demonstrates that augmenting the rare‐earth element (Lu–La) content notably increases the relative dielectric constant of the samples. In the low‐frequency region, the relative dielectric constant ranges from 6.71 × 103 to 1.28 × 105, while in the high‐frequency region, it ranges from 3.09 × 103 to 2.03 × 104. Samples doped with rare‐earth elements exhibit a high dielectric constant and low coercivity, rendering them suitable for applications in electromagnetic shielding materials. This can help reduce interference from magnetic fields on internal components while blocking electromagnetic waves.

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Exploring the promising frontiers of barium hexaferrite and barium titanate composites for electromagnetic shielding applications

Salem,

Darwish,

Hemeda

et al. 2023

Appl. Phys. A

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This study provides a comprehensive synthesis and meticulous examination of barium hexaferrite (BHF), barium titanate (BT), and their respective nanocomposites, unveiling their potential in specific applications, including electromagnetic interference shielding. The successful formation of BHF and BT was confirmed through Fourier-transform infrared (FTIR) spectroscopy and X-ray diffraction (XRD) analyses, revealing distinct absorption peaks indicative of the tetragonal configuration of BT and the BHF’s crystal structure. Scanning electron microscopy (SEM) depicted the unique morphologies and dispersions of particles in the synthesized nanocomposites, with BHF appearing larger (~ 82 nm) than BT (~ 50 nm). Vibrating sample magnetometry (VSM) findings exhibited an increased resistance to demagnetization with the addition of BT, despite a slight decline at 75% BT concentration due to the non-magnetic nature of BT dominating. Uniquely, the study presented an in-depth analysis of the composites’ conductivity, detailing their non-monotonic behavior across a frequency range. A detailed investigation into the complex permittivity and permeability revealed the composite’s enhanced ability to store and dissipate both electrical and magnetic energy, a function influenced by the concentrations of BT and BHF. A pivotal highlight of this research was the significant achievement of a reflection loss (RL) value of − 45 dB at 9.3 GHz for the composite with 75% BHF, suggesting the composite’s potential as an effective microwave absorber. This study represents a significant step toward designing and optimizing nanocomposites for specific applications in the realm of electromagnetic materials.

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Dielectric properties and magnetic behavior OF Gd3+ substituted M-type SrFe12O19 nanoferrites by auto combustion method using urea and citric acid mixtures as a dual fuel

Cited by 11 publications

References 54 publications

Influence of Gd and Ni doping on the structural, morphological, and magnetic properties of M-type calcium hexaferrite

Influence of Gd and Ni doping on the structural, morphological, and magnetic properties of M-type calcium hexaferrite

Structural Elucidation and Evaluation of Magnetic and Dielectric Properties of Lu–La Co‐substituted M‐Type Hexagonal Ferrites Synthesized by Chemical Co‐precipitation Method

Exploring the promising frontiers of barium hexaferrite and barium titanate composites for electromagnetic shielding applications

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