Interfacial reactivity of magnetic exchange coupled Co/α-Fe2O3(0001) interfaces
| Autor: | O. Bezencenet, Stefan Stanescu, M.-J. Guittet, R. Belkhou, Antoine Barbier, Philippe Ohresser, J. Owens |
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| Rok vydání: | 2007 |
| Předmět: |
X-ray absorption spectroscopy
Absorption spectroscopy Chemistry Analytical chemistry chemistry.chemical_element Surfaces and Interfaces Condensed Matter Physics Surfaces Coatings and Films law.invention Exchange bias Ferromagnetism law Chemical physics Materials Chemistry Reactivity (chemistry) Scanning tunneling microscope Layer (electronics) Cobalt |
| Zdroj: | Surface Science. 601:4321-4325 |
| ISSN: | 0039-6028 |
| Popis: | The present study focuses on the growth mode and interface reactivity of the prototypical Co/α-Fe2O3(0 0 0 1) ferromagnet/antiferromagnet interface. The knowledge of these properties is essential to improve our understanding of the exchange bias phenomenon. The chemical composition of the interface has been determined by means of X-ray absorption spectroscopy and the morphology of the growing Co film by scanning tunneling microscopy. Our experiments evidence a 3D growth and the presence of a spatially limited reactive interface that spreads to approximately one atomic layer on either side of the interface. This area is chemically composed by a layer of reduced hematite and a layer of oxidized cobalt. In the early stages of growth the interface composition is found to be dependent on the Co coverage and reaches quickly a steady state of fixed composition. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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