Almessiere, Munirah AbdullahSlimani, YassineGüngüneş, HakanDemir Korkmaz, AyşeBaykal, AbdulhadiTrukhanov, An V.Yasin, Ghulam2021-11-012021-11-012020Almessiere, M. A., Slimani, Y., Güngüneş, H., Korkmaz, A. D., Baykal, A., Trukhanov, A. V., & Yasin, G. (2020). SrCoxZrxFe12? 2xO19 and SrNixZrxFe12? 2xO19 hexaferrites: A Comparison Study of AC Susceptibility, FC-ZFC and hyperfine interactions. Chinese Journal of Physics, 66, 596-605.0577-9073https://doi.org/10.1016/j.cjph.2020.05.012https://hdl.handle.net/11491/7223This study compares the AC susceptibility, FC-ZFC and hyperfine interactions of Sr(CoxZrx) Fe12-2xO19 and Sr(NixZrx)Fe12-2xO19 hexaferrites (HFs) manufactured via ultrasonic route. The formation of M-type hexaferrites have been confirmed by X-ray powder diffraction (XRD), Fourier transform-infrared spectroscopy (FT-IR) and high-resolution transmission electron microscopy (HR-TEM) techniques. Scanning electron microscopy (SEM) presented the hexagonal-platelet morphology of products. The variation in isomer shift, line width, quadrupole splitting and hyperfine magnetic field values of them have been governed by Fe-57 Mossbauer spectroscopy which showed that Co2+ and Zr4+ ions located at generally octahedral and 2b sites, while Ni2+ and Zr4+ ions located at octahedral 12k and 4f(2) sites. Measurements of magnetization versus temperature (M-T) and AC susceptibility versus temperature were carried out. The various synthesized HFs displayed ferrimagnetic behavior in the temperature interval of 10-325 K. Super-spin glass-like behavior was noticed at lower temperatures. Neel-Arrhenius and Vogel-Fulcher models were used to explore the experimental AC susceptibility. It was showed that a lower Co-Zr substitution content leads to strengthen the magnetic exchange interactions, however even low Ni-Zr substitution content provoke a reduction in magnetic exchange interactions.eninfo:eu-repo/semantics/closedAccessSrFe12O19AC SusceptibilityFC-ZFCHyperfine InteractionsSonochemical SynthesisArticle6659660510.1016/j.cjph.2020.05.012Q2WOS:0005600043000102-s2.0-85087295384Q1