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RESEARCH PRODUCT
Oxygen on Fe(110): magnetic properties of the adsorbate system
Gerd SchönhenseMathias GetzlaffJoachim Bansmannsubject
Materials scienceMagnetic momentIron oxidechemistry.chemical_elementCondensed Matter PhysicsEpitaxyMolecular physicsOxygenElectronic Optical and Magnetic MaterialsOverlayerCondensed Matter::Materials Sciencechemistry.chemical_compoundNuclear magnetic resonancechemistryFerromagnetismChemisorptionAntiferromagnetismdescription
Abstract Investigations concerning the electronic and magnetic properties of oxygen adsorbed on magnetized iron films were carried out by means of angle and spin resolving photoelectron spectroscopy. Iron(1 1 0), epitaxially grown on a W(1 1 0) crystal, served as the ferromagnetic substrate. Exchange splittings of the O 2p x derived level were detected demonstrating a magnetic coupling between the chemisorbate and the iron layer. This observation indicates the presence of an induced magnetic moment within the adsorbate overlayer. Variations of the exchange splitting occurred as a function of the oxygen coverage, energy of the exciting radiation, and detection angle of the emitted photoelectrons pointing to a k ‖ -dependent exchange splitting. High oxygen exposures lead to a FeO overlayer at the surface, showing vanishing peak separations due to the antiferromagnetic behavior of iron oxide.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1999-03-01 | Journal of Magnetism and Magnetic Materials |