Studies of Mg-O overlayers on Co(0001): Growth mode and CO chemisorption properties

J. Lahtinen; Jukka Vaari; Anja Talo; A. Vehanen; Pekka Hautojärvi

doi:10.1016/0039-6028(91)90027-P

Studies of Mg-O overlayers on Co(0001): Growth mode and CO chemisorption properties

J. Lahtinen^*, Jukka Vaari, Anja Talo, A. Vehanen, Pekka Hautojärvi

^*Tämän työn vastaava kirjoittaja

Aalto University

Tutkimustuotos: Lehtiartikkeli › Article › Scientific › vertaisarvioitu

33 Sitaatiot (Scopus)

Abstrakti

The growth of oxidized Mg layers on Co(0001) single crystal was studied using X-ray photoelectron spectroscopy (XPS), thermal desorption spectroscopy (TDS) and low energy electron diffraction (LEED). Magnesium was evaporated in metallic form and oxidized by preabsorbed oxygen diffusing to the surface from the subsurface region of the Co crystal. The simultaneous multilayers mechanism of the film growth was observed by the comparison of XPS and TDS data. No LEED pattern was observed from the overlayer. The first layer grew as MgO and the next layers as MgO_x (x≈ 0.5). Partially oxidized MgO_x on Co(0001) dissociated CO resulting in fully oxidized MgO. The TDS results showed blocking of adsorption sites by MgO.

Alkuperäiskieli	Englanti
Sivut	244-254
Sivumäärä	11
Julkaisu	Surface Science
Vuosikerta	245
Numero	3
DOI - pysyväislinkit	https://doi.org/10.1016/0039-6028(91)90027-P
Tila	Julkaistu - 2 huhtik. 1991
OKM-julkaisutyyppi	A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

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10.1016/0039-6028(91)90027-P

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@article{6e9f523ddcd54f8ab2761f52bee6d545,

title = "Studies of Mg-O overlayers on Co(0001): Growth mode and CO chemisorption properties",

abstract = "The growth of oxidized Mg layers on Co(0001) single crystal was studied using X-ray photoelectron spectroscopy (XPS), thermal desorption spectroscopy (TDS) and low energy electron diffraction (LEED). Magnesium was evaporated in metallic form and oxidized by preabsorbed oxygen diffusing to the surface from the subsurface region of the Co crystal. The simultaneous multilayers mechanism of the film growth was observed by the comparison of XPS and TDS data. No LEED pattern was observed from the overlayer. The first layer grew as MgO and the next layers as MgOx (x≈ 0.5). Partially oxidized MgOx on Co(0001) dissociated CO resulting in fully oxidized MgO. The TDS results showed blocking of adsorption sites by MgO.",

author = "J. Lahtinen and Jukka Vaari and Anja Talo and A. Vehanen and Pekka Hautoj{\"a}rvi",

year = "1991",

month = apr,

day = "2",

doi = "10.1016/0039-6028(91)90027-P",

language = "English",

volume = "245",

pages = "244--254",

journal = "Surface Science",

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publisher = "Elsevier",

number = "3",

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TY - JOUR

T1 - Studies of Mg-O overlayers on Co(0001)

T2 - Growth mode and CO chemisorption properties

AU - Lahtinen, J.

AU - Vaari, Jukka

AU - Talo, Anja

AU - Vehanen, A.

AU - Hautojärvi, Pekka

PY - 1991/4/2

Y1 - 1991/4/2

N2 - The growth of oxidized Mg layers on Co(0001) single crystal was studied using X-ray photoelectron spectroscopy (XPS), thermal desorption spectroscopy (TDS) and low energy electron diffraction (LEED). Magnesium was evaporated in metallic form and oxidized by preabsorbed oxygen diffusing to the surface from the subsurface region of the Co crystal. The simultaneous multilayers mechanism of the film growth was observed by the comparison of XPS and TDS data. No LEED pattern was observed from the overlayer. The first layer grew as MgO and the next layers as MgOx (x≈ 0.5). Partially oxidized MgOx on Co(0001) dissociated CO resulting in fully oxidized MgO. The TDS results showed blocking of adsorption sites by MgO.

AB - The growth of oxidized Mg layers on Co(0001) single crystal was studied using X-ray photoelectron spectroscopy (XPS), thermal desorption spectroscopy (TDS) and low energy electron diffraction (LEED). Magnesium was evaporated in metallic form and oxidized by preabsorbed oxygen diffusing to the surface from the subsurface region of the Co crystal. The simultaneous multilayers mechanism of the film growth was observed by the comparison of XPS and TDS data. No LEED pattern was observed from the overlayer. The first layer grew as MgO and the next layers as MgOx (x≈ 0.5). Partially oxidized MgOx on Co(0001) dissociated CO resulting in fully oxidized MgO. The TDS results showed blocking of adsorption sites by MgO.

UR - http://www.scopus.com/inward/record.url?scp=0026413055&partnerID=8YFLogxK

U2 - 10.1016/0039-6028(91)90027-P

DO - 10.1016/0039-6028(91)90027-P

M3 - Article

AN - SCOPUS:0026413055

SN - 0039-6028

VL - 245

SP - 244

EP - 254

JO - Surface Science

JF - Surface Science

IS - 3

ER -

Studies of Mg-O overlayers on Co(0001): Growth mode and CO chemisorption properties

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