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Please use this identifier to cite or link to this item: http://hdl.handle.net/2262/55889

Title: Atomic scale spin-dependent STM on magnetite using antiferromagnetic STM tips
Author: SHVETS, IGOR
MURPHY, SHANE
Sponsor: Science Foundation Ireland
Author's Homepage: http://people.tcd.ie/ivchvets
http://people.tcd.ie/shmurphy
Keywords: spin-polarised STM
MnNi
antiferromagnet
magnetite
Issue Date: 2005
Citation: Murphy, S.; Ceballos, S. F.; Mariotto, G.; Berdunov, N.; Jordan, K.; Shvets, I. V.; Mukovskii, Y. M., Atomic scale spin-dependent STM on magnetite using antiferromagnetic STM tips, Microscopy Research and Technique, 66, 2-3, 2005, 85-92
Series/Report no.: Microscopy Research and Technique
66
2-3
Abstract: STM tips made from antiferromagnetic MnNi have been used to investigate the atomic structure of the (001) and (111) surfaces of Fe3O4. The clean (001) surface displays a (root 2 x root 2)R45 degrees superlattice, which is attributed to charge-ordering on the surface, where Fe2+-Fe2+ and Fe3+-Fe3+ dimers can be discriminated. The oxygen-terminated (111) surface is characterized by a hexagonal superlattice with a periodicity of 42 A. Oxygen vacancies are observed in atomically resolved images of this superlattice. In the presence of an external magnetic field of 60 mT, a significant change in the atomic corrugation in the topmost oxygen layer around each of these defects is observed. The results on both (001) and (111) surfaces are discussed in terms of possible spin-polarized effects.
Description: PUBLISHED
URI: http://hdl.handle.net/2262/55889
Related links: http://dx.doi.org/10.1002/jemt.20148
Appears in Collections:Physics (Scholarly Publications)

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