4.5 Article

Characterizations analysis of magneto-structural transitions in Ce-Co doped SrM based nano Sr1-xCexFe12-xCoxO19 hexaferrite crystallites prepared by ceramic route

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ELSEVIER
DOI: 10.1016/j.jmmm.2019.166013

关键词

Hexaferrites; Magnetization; Anisotropy; Coercivity; Squareness; Demagnetization

资金

  1. National Natural Science Foundation of China [51472004, 51272003, 51802002]

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Herein, to analyze as a smooth microwave signal contributor in recording media, we have successfully synthesized Ce-Co co-doped SrM based nano hexaferrite crystallites through conventional ceramic route. The magneto-structural properties were studied analytically by employing different characterizations. Consequently, Rietveld refinement of X-ray diffraction (XRD) certified the phase singularity, with space group P6(3)/mmc hexagonal. Field Emission Scanning Electron Microscope (FESEM) revealed the aggregation of grains into regular hexagonal platelets of sizes similar to 1 to 2 mu m Transmission electron microscope (TEM) estimated the grain size and high crystallinity. X-ray photoelectron spectroscopy (XPS) corroborated the host and dopant elements in diverse chemical states, affecting the magneto-structural parameters. Vibrating sample magnetometer (VSM) validated the ferromagnetic nature of samples at 300 K by measuring their saturation magnetization (M-s). Accordingly; Stoner Wolhfarth (S-W) model confirmed the M-s values, the domain singularity with squareness ratio (SQR) of similar to 0.51 and the high uniaxial magneto-crystalline anisotropy (MCA) of the prepared hexaferrites. Different magnetic parameters were analyzed using coupled intrinsic and normal demagnetization curves, results in B-r > 1 kG & H-c > 1 kOe, validating our samples usage in permanent magnetic industry.

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