Enhanced atomic-scale contrast on Fe3O4(100) observed with an FeSTM tip

Authors
Koltun, R Herrmann, M Guntherodt, G Brabers, VAM
Citation
R. Koltun et al., Enhanced atomic-scale contrast on Fe3O4(100) observed with an FeSTM tip, APPL PHYS A, 73(1), 2001, pp. 49-53
Citations number
35
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
ISSN journal
09478396 → ACNP
Volume
73
Issue
1
Year of publication
2001
Pages
49 - 53
Database
ISI
SICI code
0947-8396(200107)73:1<49:EACOFO>2.0.ZU;2-I
Abstract
Clean (100) surfaces of a synthetic single crystal of magnetite (Fe3O4) hav e been prepared in situ using current pulses in a scanning tunneling micros cope without subsequent annealing. We have observed atomically resolved ter races with rows of Fe2+ and Fe3+ ions of the B-sublattice: (octahedrally co ordinated lattice sites). Along these rows a long-distance corrugation (sim ilar to 12W) has been observed at 300K using in situ prepared Fe tunneling tips. This corrugation is interpreted as a Wigner localization associated w ith a Verwey transition above 300K in the top surface layer.