Atomic Concentration Wave in Pt-Ti and Pd-Ti Alloys.

  • Kurimoto Yukihiro
    Department of Applied Physics, School of Science and Engineering, Waseda University, 3-4-1 Ohkubo, Shinjuku, Tokyo 169-8555
  • Tsunoda Yorihiko
    Department of Applied Physics, School of Science and Engineering, Waseda University, 3-4-1 Ohkubo, Shinjuku, Tokyo 169-8555

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Abstract

The atomic short range order of Pd–Ti and Pt–Ti alloys with a Ti concentration of about 10 at.% was studied by neutron diffraction. Temperature-independent diffuse satellite peaks were observed at incommensurate positions on the [100] axis. Due to the various properties of the diffuse satellite peaks, a concentration wave of constituent atoms appeared as a reflection of the special shape of the Fermi surfaces of the alloys. Its relationship to the Pt8Ti superlattice structure is discussed.

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