Open AccessTHE ORDERED STRUCTURE FORMED ON Mo (001) AND Mo(110) SURFACES BY BOMBARDMENT OF NITROGEN IONS
Author(s) -
樊永年,
中国科学院金属研究所
Publication year - 1985
Publication title -
acta physica sinica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.34.813
Subject(s) - auger , nitrogen , materials science , annealing (glass) , ion , desorption , liquid nitrogen , analytical chemistry (journal) , carbon fibers , thermal desorption , crystallography , atomic physics , adsorption , chemistry , metallurgy , physics , composite material , organic chemistry , composite number , chromatography
After bombarding the Mo (001) and Mo (110) surfaces contained trace amount of carbon and oxygen with nitrogen ions of the energy of 1 keV and the beam current of 6 μA for 10-15 min, a very strong Auger pcak of nitrogen appeared in AES.The LBED observation showed that surface structure was disordered from room temperature to 350℃ annealing. When the sample was heated to the temperature range530-650℃, three types of LEED pattern, i. e.,c(2×2)-N, p(2×2)-N and (4(21/2)×21/2 R45°-N, O formed on Mo(001). In the case of Mo (110) only one type LEED pattern of c(7×3)-N was observed.The fact that the LEED structure of surface related to thermal desorption indicates that ordered structure depends on coverage of notrogen and temperature, and provi--des some information about phase transformation on the surface.
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