FIM Observations of Pd/M(M:W,Mo,Ta,Nb) Atomic Interfaces and Pd Growth Layer.

  • OKUNO Kimio
    Department of Electrical Engineering, Nagasaki Inst. of Appl. Science

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Other Title
  • Pd/M(M:W,Mo,Ta,Nb)原子界面とPd成長層のFIM観察
  • Pd M M W Mo Ta Nb ゲンシ カイメン ト Pd セイチョウソウ

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Abstract

The growth processes and the atomic structure of Pd ultra-thin films vapor deposited on the substrate metals (W, Mo, Ta, Nb), and a hydrogen interaction with the Pd monolayer film were investigated by a field ion microscope (FIM) with atomically high resolution. The Pd monolayer on the substrate metals exhibits a pseudomorphic structure which has an atomic arrangement identical to the substrate and is strongly bound with the substrate metal atoms. The desorption field strengths of the pseudomorphic Pd monolayer on W (011), Mo (011), Ta (011) and Nb (011) planes were measured. The fields depend strongly on the evaporation fields of the substrate metals and are higher than the evaporation field of Pd. In the growth of the Pd films, the two different Pd structures are observed. The observed structures are the Pd overlayer grown with the Pd inherent atomic structure and the stable pseudomorphic Pd underneath. Hydrogen interactions with the pseudomorphic Pd monolayer grown on W (011) and Mo (011) planes were also studied.

Journal

  • Shinku

    Shinku 36 (8), 650-656, 1993

    The Vacuum Society of Japan

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