Study of Single Crystal Fe2TiO4 by the Measurement of Magnetization and Mossbauer Spectra

  • Kose Katsumi
    Department of Physics, Faculty of Science, The University of Tokyo
  • Ueki Akikatsu
    Department of Physics, Faculty of Science, The University of Tokyo
  • Iida Shuichi
    Department of Physics, Faculty of Science, The University of Tokyo

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  • Study of Single Crystal Fe<SUB>2</SUB>TiO<SUB>4</SUB> by the Measurement of Magnetization and Mössbauer Spectra
  • Study of Single Crystal Fe2TiO4 by the

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A single crystal of Fe2TiO4 was grown with an infrared ray image furnace and its magnetization and Mössbauer srectra were measured. In a specimen squeezed along [001], we found that, at 77 K, the tetragonal axis and the spontaneous moment are fixed along [001], with a slight deviation in (110) or (1\bar10) plane (about 10∼20°) for the moment. In Mössbauer measurement, it was observed that the sharpness of the spectrum was largely affected by the domain distribution. We found several peaks which is ascribed to a special group of Fe2+ ions. We conclude that the E.F.G.Z axis of these Fe2+ ions is vertical to the hyperfine magnetic field Hn and they are on B sites with 3d electron orbitals spreading like that of dεyz or dεzx.

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