OK-edge x-ray magnetic circular dichroism of atomic O adsorbed on an ultrathin Co/Cu(100) film: Comparison with molecular CO on Co/Cu(100) - art. no.132405

Authors
Amemiya, K Yokoyama, T Yonamoto, Y Matsumura, D Ohta, T
Citation
K. Amemiya et al., OK-edge x-ray magnetic circular dichroism of atomic O adsorbed on an ultrathin Co/Cu(100) film: Comparison with molecular CO on Co/Cu(100) - art. no.132405, PHYS REV B, 6413(13), 2001, pp. 2405
Citations number
26
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
01631829 → ACNP
Volume
6413
Issue
13
Year of publication
2001
Database
ISI
SICI code
0163-1829(20011001)6413:13<2405:OXMCDO>2.0.ZU;2-O
Abstract
We observed O K-edge x-ray magnetic circular dichroism (XMCD) of atomic O a dsorbed on a fcc Co thin film grown epitaxially on Cu(100). The XMCD of c(2 x2)O showed a negative sign at the O1s-->2p transition. The negative sign i ndicates parallel alignment of the O orbital moment with the substrate magn etization. This finding is in contrast to the CO/Co/Cu(100) case where a po sitive XMCD was observed at the O1s -->CO2 pi* transition. A possible expla nation for this discrepancy is proposed referring to recent theoretical pre diction.