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Chemical structure of the interface between MgO films and Fe(001)

Authors
Oh, HLee, SBSeo, JMin, HG김재성
Issue Date
Jan-2003
Publisher
AMER INST PHYSICS
Citation
APPLIED PHYSICS LETTERS, v.82, no.3, pp.361 - 363
Journal Title
APPLIED PHYSICS LETTERS
Volume
82
Number
3
Start Page
361
End Page
363
URI
https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/16221
DOI
10.1063/1.1538311
ISSN
0003-6951
Abstract
The chemical structure of the interface formed during MgO growth on Fe(001) is studied by vibration spectroscopy employing a high resolution electron energy loss spectrometer. We find direct, spectroscopic evidence for the formation of FeO layer at the interface that is triggered by the dissociation of oxygen molecule by deposited Mg. Even though the growth conditions of MgO are widely varied, FeO cannot be eradicated at the interface. Hence, we propose that the phase where FeO and MgO coexist at the interface, is an entropically stabilized one in regards to the very small difference between the bond dissociation energy of FeO and that of MgO. (C) 2003 American Institute of Physics.
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