Orientational ordering of commensurate Fe(CO)5 monolayers on graphite

R. Wang, H. Taub, H. Shechter, R. Brener, J. Suzanne, Flemming Yssing Hansen

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    Abstract

    Elastic neutron diffraction and Mössbauer spectroscopy have been used to study the structure, orientational-disordering (OD) transition, and melting of an Fe(CO)5 submonolayer adsorbed on Grafoil. The OD transition occurs between 150 and 167 K from a two-sublattice (sqrt[7]×sqrt[21]) structure to a nearly (sqrt[7]×sqrt[7]) phase in which the molecules are believed to rotate about the surface normal. Mössbauer spectra exhibit a more abrupt variation with temperature near melting at 170 K than through the OD transition.
    Original languageEnglish
    JournalPhysical Review B
    Volume27
    Issue number9
    Pages (from-to)5864-5867
    ISSN2469-9950
    DOIs
    Publication statusPublished - 1983

    Bibliographical note

    Copyright (1983) by the American Physical Society.

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