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Factors controlling phase formation of novel Sr-based Y-type hexagonal ferrite nanoparticles

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Abstract

New Sr-based Y-type nanocrystalline hexagonal ferrites with a nominal chemical composition of Sr 2Mg 2Fe 12 O 22 (Sr 2Y) were prepared by autocombustion from mixtures of Sr(NO 3) 2, Mg(NO 3) 2⋅6H 2O and Fe(NO 3) 3⋅9H 2O. The newly prepared Sr 2Y nanocrystalline particles were characterized by powder X-ray diffraction (XRD). A well crystalline phase of Sr 2Y with hexagonal crystal structure was observed. Fourier transform infrared spectroscopy (FTIR) studies revealed the information about the positions of the ions and their bonds within the lattice structure of the Sr 2Y. The chemical elements and their oxidation states in the Sr 2Y hexaferrites were determined using X-ray photoelectron spectroscopy (XPS). The XRD, FTIR and XPS studies confirmed the formation of Sr 2Mg 2Fe 12 O 22 hexaferrites. The morphology and porosity of the prepared Sr 2Y nanocrystalline Sr 2Y hexaferrite particles were studied by field emission scanning electron microscopy. The magnetic properties of Sr 2Y hexaferrites showed dependence on the methods of preparation conditions and calcination treatments. The values of coercivity, saturation magnetization and retentivity were in the range of 21.33–19.66 kA m −1, 42.44– 38.72 emu g −1 and 10.05–13.19 emu g −1 respectively.

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Authors and Affiliations

  1. Department of Physics, College of Engineering, Guindy, Anna University, Chennai, 600 025, India

    R THOLKAPPIYAN & K VISHISTA

  2. Department of Physics, College of Science, United Arab Emirates University, Al Ain, United Arab Emirates

    R THOLKAPPIYAN & FATHALLA HAMED

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  1. R THOLKAPPIYAN
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  2. K VISHISTA
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  3. FATHALLA HAMED
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Correspondence to R THOLKAPPIYAN.

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THOLKAPPIYAN, R., VISHISTA, K. & HAMED, F. Factors controlling phase formation of novel Sr-based Y-type hexagonal ferrite nanoparticles. Pramana - J Phys 88, 27 (2017). https://doi.org/10.1007/s12043-016-1325-4

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  • DOI: https://doi.org/10.1007/s12043-016-1325-4

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