Effect of Magnetic Field on Crystal Lattice in Dysprosium Studied by X-Ray Diffraction.

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  • Kida Yoshitoshi
    Department of Physics, Faculty of Science and Technology, Keio University, Hiyoshi, Yokohama 223–8522
  • Tajima Keisuke
    Department of Physics, Faculty of Science and Technology, Keio University, Hiyoshi, Yokohama 223–8522
  • Shinoda Yoshio
    Department of Physics, Faculty of Science and Technology, Keio University, Hiyoshi, Yokohama 223–8522
  • Hayashi Kohki
    Department of Physics, Faculty of Science and Technology, Keio University, Hiyoshi, Yokohama 223–8522
  • Ohsumi Hiroyuki
    Department of Physics, Faculty of Science and Technology, Keio University, Hiyoshi, Yokohama 223–8522

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Abstract

A change of the c-lattice parameter of Dy which is induced by magnetic field along the easy direction of magnetization has been studied by X-ray diffraction in the temperature range of the helix phase. A discontinuous change of the c lattice parameter accompanying to the helix to fan or ferromagnetic transition has been observed below 170, K, but it becomes continuous change above 170, K to TN. The lattice modulation with the same wave number as the magnetic modulation has been observed at the distorted helix phase, which can be explained in terms of magnetoelastic effect.

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