Effect of Dy3+ ions substitution on structural, electrical, and dielectric properties of SrDyxFe12-xO19 hexaferrite prepared by sol-gel combustion method

The substitution of Dy 3+ ions in the M-type hexaferrite structure has been successfully synthesized by sol-gel combustion method according to the formula SrDy x Fe 12-x O 19 ( x = 0.0, 0.08, 0.16, 0.24, 0.32, and 0.40). The XRD analysis confirmed the formation of single-phase M-type hexagonal struc...

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Published inJournal of electroceramics Vol. 51; no. 2; pp. 104 - 121
Main Authors Mahapatro, Jayashri, Meena, Sher Singh, Agrawal, Sadhana
Format Journal Article
LanguageEnglish
Published New York Springer US 01.10.2023
Springer Nature B.V
Subjects
Ceramics
Characterization and Evaluation of Materials
Chemistry and Materials Science
Combustion
Composites
Crystallites
Crystallography and Scattering Methods
Dielectric loss
Dielectric properties
Dielectric relaxation
Electrochemistry
Glass
Lattice parameters
Materials Science
Natural Materials
Optical and Electronic Materials
Permittivity
Sol-gel processes
Substitutes
Grain boundaries
Strontium hexaferrite
Sol-gel combustion method
Electrical conduction mechanism
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Summary:The substitution of Dy 3+ ions in the M-type hexaferrite structure has been successfully synthesized by sol-gel combustion method according to the formula SrDy x Fe 12-x O 19 ( x = 0.0, 0.08, 0.16, 0.24, 0.32, and 0.40). The XRD analysis confirmed the formation of single-phase M-type hexagonal structures up to x = 0.24 compositions. The average crystallite size for the SrDy x Fe 12-x O 19 samples ranges from 90.64 to 290.04 nm, whereas the value of the lattice parameters 'a' and 'c' vary from 5.8590 - 5.8879 Å and 22.9675 - 23.0761 Å, respectively. Scanning electron microscopy (SEM) was used for morphological analysis. Due to ceasing effect of polarization, the dielectric constant decreases in the higher frequencies. The SrDy x Fe 12-x O 19 hexaferrites exhibit non-Debye type dielectric relaxation behavior confirmed by complex impedance spectroscopy (CIS) investigation. The SrDy x Fe 12-x O 19 samples can be utilized as a promising material for various device applications due to a decrease in dielectric loss and an increase in dielectric constant with increasing Dy 3+ ions concentration.
ISSN:1385-3449
1573-8663
DOI:10.1007/s10832-023-00320-2