Characterization of Fe–Nb sputtered thin films |
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| Institution: | 1. Materials Research Laboratory, University of Nova Gorica, Nova Gorica, Slovenia;2. Laboratory for Simulation of Materials and Processes, Institute of Metals and Technology, Lepi pot 11, Ljubljana 1000, Slovenia;3. Laboratory for Fluid Dynamics and Thermodynamics, Faculty of Mechanical Engineering, University of Ljubljana, Aškerčeva 6, Ljubljana 1000, Slovenia;4. Photon Science, DESY, Notkestr. 85, Geb. 99, Hamburg 22609, Germany |
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| Abstract: | Structure, composition and chemical behavior of co-sputtered Fe–Nb thin films are analyzed by different techniques, as conversion electron Mössbauer spectroscopy, x-ray photoelectron spectroscopy and x-ray diffraction. It is shown that oxygen is determinative in hindering the Fe–Nb alloy formation and, as a result, Fe1−xO and Nb2O5 occur in significant amounts, even in vacuum. In spite of the oxygen role, a Fe–Nb alloy is formed in little amounts, which increase as the Nb content is increased. The increase of the Nb content is also related with the increase of Fe1−xO and with a decreasing of the metallic Fe present. Mössbauer data indicate the Fe–Nb phase present is the Fe2Nb Laves phase. |
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| Keywords: | Fe–Nb alloys Surface oxidation Mössbauer and XPS characterization |
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