Investigations on structural, Mossbauer, dielectric, and ferroelectric properties of La doped barium hexaferrite

Nishkala, K.R.; Rao, Rajat Radhakrishna; Mutalik, Srinivas; Murari, M.S.; Daivajna, Mamatha D.

doi:10.1016/j.physb.2023.414954

Physica B: Condensed Matter

2023

DOI: 10.1016/j.physb.2023.414954

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Investigations on structural, Mossbauer, dielectric, and ferroelectric properties of La doped barium hexaferrite

K.R. Nishkala¹,

Rajat Radhakrishna Rao²,

Srinivas Mutalik³

et al.

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2024

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Cited by 9 publications

(1 citation statement)

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“…Impedance spectroscopy typically uses electrically equivalent circuits that include resistors, inductors, capacitors, and specialized distributed elements. Nishkala K. et al 14 explored the La-doped BaM, Ba (1−x) La x Fe 12 O 19 (x = 0, 0.1, 0.15, and 0.20), which was prepared via a combination of ball milling and subsequent heat treatment. Dielectric spectroscopy revealed that the sample with La content x = 0.20 exhibited the highest dielectric constant and low loss.…”

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Experimental and Theoretical Realization of Morphology and Frequency Tuned Charge Transport Dynamics in Co-Zn Doped SrM Hexaferrite: Electrical, Impedance and Relaxation Realm

Thakur,

Singh,

Jotania

et al. 2024

ECS J. Solid State Sci. Technol.

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The present report comprehensively investigates the influence of sol-gel synthesized cobalt and zinc-substituted SrFe12O19 on the morphological, structural, dielectric, and electrical characteristics. XRD analysis revealed that the substituents successfully replaced Fe3+ ions, leading to the existence of a single-phase magneto-plumbite structure of M-type hexaferrite. The crystallite size decreases from 48.94 nm to 45.9 nm as the level of substitution increases in SrM hexaferrite. With increasing the substitution level, SEM micrographs exhibited the formation of grain clusters. The electrical parameters had been investigated in the 20 Hz to 2 MHz frequency range. In the low-frequency region, both dielectric constant and loss tangent decreased with Co-Zn substitution. Sr〖Co〗_0.8 〖Zn〗_0.8 〖Fe〗_10.4 O_19 sample shows the minimum value of AC conductivity 3.95×10-5 Ω-1m-1 in the high-frequency region. Both the electric modulus and impedance spectra exhibit non-Debye behavior in all samples. The Cole-Cole plots (M'' versus M') reveal the existence of a single semicircular arc in the x = 0.0 sample, caused by the grain boundary contribution.

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Experimental and Theoretical Realization of Morphology and Frequency Tuned Charge Transport Dynamics in Co-Zn Doped SrM Hexaferrite: Electrical, Impedance and Relaxation Realm

Thakur,

Singh,

Jotania

et al. 2024

ECS J. Solid State Sci. Technol.

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Effect of sintering temperature on the structural, morphological, optical and electrical properties of Ba1 − xLaxFe12O19

Nishkala,

Rao,

Mutalik

et al. 2024

Appl. Phys. A

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La substituted M-type Barium hexaferrite, Ba(1−x)La(x)Fe12O19, (x = 0.25 and 0.30) were synthesized using ball milling followed by heat treatment at 1150˚C and 1300˚C and the influence of sintering temperature as well as La doping were presented. X-ray diffraction, FESEM, dielectric spectroscopy, and ferroelectric measurements were performed to study the structural, morphological, dielectric, and ferroelectric properties of the prepared samples. Rietveld refinement on the X-ray diffraction measurement reveals the formation of a phase magnetoplumbite structure of barium hexaferrite only for the samples sintered at 1300˚C. The secondary phase, along with the major magnetoplumbite structure, was observed for the sample sintered at 1150˚C. Hexagonal plate-like grains of different sizes were observed, and samples sintered at 1300˚C showed large-size grains. Porosity was observed to decrease with La doping. Impedance spectroscopy reveals that Maxwell-Wagner-type polarisation occurs with the relaxation of mobile charges having long-range hopping. However, the ferroelectric property was suppressed for samples sintered at 1300˚C.

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Influence of Ba content on magnetic properties of the Sr0.4-xBaxLa0.4Ca0.2Fe10.8Co0.2O19 hexaferrite from recycled rare-earth tailings

Wang,

Ouyang

et al. 2024

Journal of Alloys and Compounds

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Investigations on structural, Mossbauer, dielectric, and ferroelectric properties of La doped barium hexaferrite

Cited by 9 publications

References 39 publications

Experimental and Theoretical Realization of Morphology and Frequency Tuned Charge Transport Dynamics in Co-Zn Doped SrM Hexaferrite: Electrical, Impedance and Relaxation Realm

Experimental and Theoretical Realization of Morphology and Frequency Tuned Charge Transport Dynamics in Co-Zn Doped SrM Hexaferrite: Electrical, Impedance and Relaxation Realm

Effect of sintering temperature on the structural, morphological, optical and electrical properties of Ba1 − xLaxFe12O19

Influence of Ba content on magnetic properties of the Sr0.4-xBaxLa0.4Ca0.2Fe10.8Co0.2O19 hexaferrite from recycled rare-earth tailings

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