Investigation of crystal structure, electrical and dielectric response of Ga3+ substituted Sr–Ni Y-type hexaferrites as a suitable material for high frequency applications
| dc.contributor.author | Albalawi, Hind | |
| dc.contributor.author | Arshad, Muhammad | |
| dc.contributor.author | Azhar Khan, Muhammad | |
| dc.contributor.author | Tur Rasool, Raqiqa | |
| dc.contributor.author | Asghar, Noor ul Huda | |
| dc.contributor.author | Jacob, Jolly | |
| dc.contributor.author | ETAL.. | |
| dc.date.accessioned | 2024-02-08T08:31:09Z | |
| dc.date.available | 2024-02-08T08:31:09Z | |
| dc.date.issued | 2023-03-25 | |
| dc.description | Ferrites are a unique group of oxides with excellent magnetic characteristics which have been studied and used in several fields over the past 50 years [1]. Due to their curious electrical and dielectric properties, ferrites are very important for the electronic industry [2]. Ferrites in the nanocrystalline form are used in various novel technologies, including magnetically guided medication delivery, magnetic resonance imaging (MRI), catalysts, humidity and gas sensors, magnetic fluids, MLCI, and more [3]. These uses are based on the fundamental characteristics of ferrites, which include large saturation magnetization, high electrical resistivity, negligible electrical losses, and excellent chemical stability [1]. | |
| dc.description.abstract | Technology important ferrites ceramic Sr2Ni2GaxFe12-xO22 (x = 0.00, 0.2, 0.4, 0.6, and 0.8) samples were produced using sol-gel auto combustion route. Structural, electrical, dielectric, and magnetic parameters were identified by substituting Ga3+ at the Fe3+ site. It was recognized that an increase of Ga3+ content in (Sr2Ni2GaxFe12-xO22) ceramic samples first decreased, then increased lattice parameters, and the density of samples was observed. This is because of the ionic radii and atomic weight of Ga3+ and Fe3+ cations. FTIR spectra show two characteristic absorption bands at 444-513 cm−1 caused by metal-oxygen vibrations. Due to the contribution of smaller grains of samples, the higher values of resistivity were observed, which vary from 3.78 × 1010 (Ω cm) to 1.13 × 1011 (Ω cm) by the substitution of Ga3+ ions at the octahedral site. The activation energy was measured between 0.20 and 0.61 eV. The dielectric response of Ga3+ substituted ferrite ceramic samples were studied in the 1 MHz-6 GHz frequency region. The Maxwell-Wagner bilayer model studied the effect of polarization with applied frequency on dielectric parameters. With the substitution of Ga3+, minimal losses in the range 0.34–0.44, about 6 GHz, and a high Q-value of about 10,000 were observed for each sample. In impedance spectroscopy analysis Cole-Cole plots confirm that the dielectric response is because of the influence of grain boundaries. The substitution of Ga3+ enhances saturation magnetization (68.20–71.78 emu/g) while coercivity decreases (655.86–507.86 Oe). In the present finding, the low dielectric loss, moderate permittivity, high value of the Quality factor, and very high value of resistivity of about 1.13 × 1011 that reduces the eddy current losses suggested that these materials are appropriate candidates for many high-frequency applications such as multilayer chip inductor, dielectric resonators, power applications, and microwave devices. Keywords: XRD, Sr-Ni-Ga-Fe-O System, FTIR; Resistivity, High-frequency Applications | |
| dc.identifier.citation | Arshad, M., Khan, M. A., Rasool, R. T., Arshad, M. I., Albalawi, H., Abd-Rabboh, H. S., & Jacob, J. (2023). Investigation of crystal structure, electrical and dielectric response of Ga3+ substituted Sr–Ni Y-type hexaferrites as a suitable material for high frequency applications. Ceramics International, 49(12), 21036-21049. | |
| dc.identifier.doi | https://doi.org/10.1016/j.ceramint.2023.03.239 | |
| dc.identifier.uri | https://dspace.adu.ac.ae/handle/1/843 | |
| dc.language.iso | en | |
| dc.publisher | Elsevier | |
| dc.title | Investigation of crystal structure, electrical and dielectric response of Ga3+ substituted Sr–Ni Y-type hexaferrites as a suitable material for high frequency applications | |
| dc.type | Article |