Structural, dielectric, impedance and electric modulus properties of praseodymium-substituted BaPrxFe12-X O19 nanoparticles synthesized via sol–gel method

• Published in: Applied physics. A, Materials science & processing Materials science & processing, 2022-09, Vol.128 (9), Article 762
• Main Authors: Samiullah, Asghar, H. M. Noor ul Huda Khan, Gilani, Zaheer Abbas, Khalid, Muhammad, Ahmed, Awais, Khan, Abdul Kareem, Khan, Mohammad Rizwan, Sheikh, Furhaj Ahmed, Ahmad, Naushad, Busquets, Rosa
• Format: Article
• Language: English
• Subjects: Absorption spectra; Applied physics; Characterization and Evaluation of Materials; Condensed Matter Physics; Crystallites; Dielectric properties; Doping; Grain boundaries; Hexagonal phase; High frequencies; Impedance; Lattice parameters; Machines; Magnetic properties; Magnetic storage; Manufacturing; Materials science; Nanoparticles; Nanotechnology; Optical and Electronic Materials; Permittivity; Physics; Physics and Astronomy; Praseodymium; Processes; Recording instruments; Sol-gel processes; Surfaces and Interfaces; Synthesis; Thin Films; X-ray diffraction
• ISSN: 0947-8396; 1432-0630
• DOI: 10.1007/s00339-022-05799-0

In current research work, Pr 3+ doped M-type hexaferrites having general formula BaPr x Fe 12- x O 19 (0.00 <  x  > 1.00 with 0.25 steps) were synthesized using sol–gel technique. The prepared nanoparticles were characterized via XRD for structural Study, FTIR to study the frequency band, SEM was used to investigate the morphological surface, spectroscopic impedance was used to investigate the dielectric properties and VSM was used to study magnetic properties of the prepared nanoparticles. XRD pattern for each doping case confirmed the prepared samples having hexagonal phase. The crystalline sizes were determined from 5 to 13 nm range. Lattice constants were measured to be increased with increasing Pr 3+ concentration. FTIR analysis was performed to analyze absorption band spectra. LCR meter was used to investigate the impedance, dielectric constant, electric modulus, loss tangent, and A.C conduction of the synthesized samples. From the study of dielectric, properties carried out by Maxwell Wagner model, where a constant of dielectric was found reduced in MHz’s of range of frequency, while at high frequency two relaxation peaks were observed by electron hopping of Fe 2+ to Fe 3+ ion. Reduction in both real and imaginary impedance caused decreasing trends due to the action of grain boundary. The Pr 3+ doping has influenced the magnetic properties of the synthesized nanoparticles. The prepared material exhibited to be hard ferrite, having small crystallite size at high concentration of Pr 3+ doping. Finally, by the excellent electric and magnetic properties, the prepared particles have a good potential for the applications of recording media, cancer treatment, drug delivery and high frequency devices.