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- W2913340924 abstract "Nanocrystalline Cu2+-Er3+ substituted M-type strontium hexaferrites with chemical composition Sr1−xCuxFe12−yEryO19 (x = 0.0, 0.1, 0.2, and y = 0.0, 0.4, 0.5) was synthesized using sol-gel autocombustion method, pre-sintered at 400 °C for 3 h and sintered at 950 °C for 6 h. XRD patterns shows that the sample exhibit pure crystalline structure with the absence of magnetite (α-Fe2O3) and other secondary phases. The idea of the formation of M-type hexagonal ferrite was given by the presence of two prominent peaks at 454 and 591 cm−1 in the spectra of FTIR. FESEM micrographs show agglomerated crystallites as a result of magnetic interaction between the crystallites. The band gap calculated from UV-vis NIR spectroscopy increase with Cu2+-Er3+ with substitution. The dielectric properties were discussed using Koop's phenomenological and Maxwell-Wagner model. The Er3+ ions causes spin canting effect, magnetic dilution and the collapsed of the magnetic collinearity thereby resulting in decrease magnetization. The Cu2+ ions influence the magnetocrystalline anisotropy in a negative manner thereby leading to reduced coercivity." @default.
- W2913340924 created "2019-02-21" @default.
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- W2913340924 date "2019-02-22" @default.
- W2913340924 modified "2023-10-18" @default.
- W2913340924 title "Structural, dielectric, and magneto-optical properties of Cu<sup>2+</sup>-Er<sup>3+</sup> substituted nanocrystalline strontium hexaferrite" @default.
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- W2913340924 doi "https://doi.org/10.1088/2053-1591/ab063b" @default.
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