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OXIDATION OF Nb(001) STUDIED BY HIGH-RESOLUTION CORE-LEVEL PHOTOEMISSION

Author

Listed:
  • W.-S. LO

    (Research Division, Synchrotron Radiation Research Center, Hsinchu, Taiwan, ROC)

  • H.-H. CHEN

    (Center for Measurement Standards, ITRI, Hsinchu, Taiwan, ROC)

  • T.-S. CHIEN

    (Research Division, Synchrotron Radiation Research Center, Hsinchu, Taiwan, ROC)

  • C.-C. TSAN

    (Department of Physics, National Tsing Hua University, Hsinchu, Taiwan, ROC)

  • B.-S. FANG

    (Research Division, Synchrotron Radiation Research Center, Hsinchu, Taiwan, ROC;
    Department of Physics, National Tsing Hua University, Hsinchu, Taiwan, ROC)

Abstract

Using high-resolution core-level photoemission with synchrotron radiation, we observed two suboxide states on the Nb(001) surface, which was heated in1×10-6TorrO2for several hours and then annealed several times at high temperatures in an ultrahigh-vacuum condition. These suboxide states were identified asNb2Oand NbO from theNb3d5/2core-level photoemission spectra. The relative amounts of these suboxide states varied with the annealing temperature, showing that at progressively higher temperatures more oxygen-deficient oxides were produced. Meanwhile, LEED patterns of the complex superstructures of the oxidized surfaces also changed. Many of these findings are analogous with other oxidized refractory metals.

Suggested Citation

  • W.-S. Lo & H.-H. Chen & T.-S. Chien & C.-C. Tsan & B.-S. Fang, 1997. "OXIDATION OF Nb(001) STUDIED BY HIGH-RESOLUTION CORE-LEVEL PHOTOEMISSION," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 4(04), pages 651-654.
    • Handle: RePEc:wsi:srlxxx:v:04:y:1997:i:04:n:s0218625x9700064x
    DOI: 10.1142/S0218625X9700064X
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    Keywords

    ; 61.72.Cc; 73.20.-r; 79.60.-i;
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