Je Hoon Kim

Kookmin University, Sŏul, Seoul, South Korea

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Publications (2)3.46 Total impact

  • [Show abstract] [Hide abstract]
    ABSTRACT: The single-phase Cr-doped Sr2Fe1-xCrxMoO6 (x=0.00, 0.03, 0.07, 0.1) powder have been prepared by a solid-state reaction method. The crystalline structure of all the Cr-doped samples was tetragonal (I4/mmm) at room temperature, but the crystal symmetry changes into cubic (Fm-3m) above the Curie temperature. As the Cr-doping range increases, the saturation magnetization decreases and the coercivity force increase. Mössbauer spectra are shown the line broadening and 1, 6 and 3, 4 linewidth difference due to the anisotropic hyperfine field fluctuation.
    No preview · Article · Nov 2004 · Journal of Magnetism and Magnetic Materials
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    ABSTRACT: The Cr doped ordered perovskite powder of Sr2Fe0.93Cr0.07MoO6 has been prepared by a solid-state reaction method. The chemical composition and the crystalline structure of the sample were confirmed with the Rutherford backscattering spectrometer spectrum and X-ray diffraction pattern analysis. The crystalline structure was determined to be tetragonal with lattice parameters a0 = 5.572 Å and c0 = 7.900 Å, respectively. The magnetic properties of the Sr2Fe0.93Cr0.07MoO6 have been studied by the vibrating sample magnetometer and the Mössbauer spectroscopy. The saturation magnetization and the coercive force were 26.5 emu/g and 101.2 Oe at room temperature. Mössbauer spectra measurements of the Sr2Fe0.93Cr0.07MoO6 have been taken at various temperatures ranging from 15 to 450 K. Analysis of Mössbauer spectra has considered with next nearest-neighbour interactions and the anisotropic hyperfine field fluctuation. The anisotropic field fluctuation of +H (P+ = 0.85) is greater than that of −H (P− = 0.15). (© 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
    No preview · Article · Jun 2004 · physica status solidi (b)