TITLE

Observation of a high negative spin polarization at the Fe/MgO(100) surface oxidized at room temperature

AUTHOR(S)
Kurahashi, M.; Sun, X.; Entani, S.; Yamauchi, Y.
PUB. DATE
September 2008
SOURCE
Applied Physics Letters;9/29/2008, Vol. 93 Issue 13, p132505
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Spin polarization of an Fe/MgO(100) surface oxidized at room temperature has been analyzed with a spin-polarized metastable helium beam, which is an extremely surface sensitive spin probe, under high magnetic fields (0–50 kOe). The spin polarization of the Fe surface, although it initially decays with oxygen exposure, increases at >20 L (1 L=10-6 Torr sec) and becomes comparable to that observed for a clean Fe surface at >100 L. The polarization is negative and especially high at around the Fermi level. This may be understood if we assume the formation of Fe3O4.
ACCESSION #
34771890

 

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