X-Ray Study of the Phase Transition in Magnetite

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  • Yoshida Jiro
    Department of Physics, Faculty of Science, University of Tokyo
  • Iida Shuichi
    Department of Physics, Faculty of Science, University of Tokyo

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  • X Ray Study of the Phase Transition in

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Abstract

Temperature dependence of the lattice parameters of magnetite in cubic and monoclinic phases were measured accurately between 80 K and 295 K by means of single crystal X-ray diffraction. It was shown that the monoclinic distortion of the lattice in the low temperature phase has a tendency to become large with the lowering of temperature. A discontinuous increase of the unit cell volume at the transition temperature on cooling was clarified. Several superlattice reflections were also investigated, and possibility of the atomic displacements modulated with the wave vectors k=[100], [010] and [001] with X1 symmetry is discussed.

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