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L'anisotropie magnétique perpendiculaire induite par oxydation et recuit thermique : de la structure au magnétisme

Abstract : In the domain of thin film (thickness ~ Å) combining a magnetic metal (Fe, Co, Ni) and a non-magnetic (largely metal or insulator), remarkable physical properties (magnetization, transport) require fine structural characterization. In particular, include the case of tunnel junctions (metal / insulator / metal) with perpendicular magnetization which are being studied in the laboratory Spintec (UMR8191 (CEA / CNRS / UJF). These nanomaterials are deposited by physical (sputtering) in this laboratory. These nanostructures are probed by X-ray diffraction in the Neel Institute (UPR 2940) via collaboration between Spintec and a team of the Institute (Surface, Interfaces and Nanostructures Department MCFP, Condensed Matter Materials and Functions). These reflectivity measurements X are the preferred sensor of choice in the context of this thesis. Other routes are also used: using means such as synchrotron radiation absorption spectroscopy X-ray: EXAFS, XANES and XMCD. The thesis will aim to study these phenomena experimentally in continuous layers on the tunnel junction stacks with perpendicular magnetization. Specifically, the thesis will include the magnetic measurements (performed at the Institut Néel SQUID magnetometry including HALL and low temperature) through a battery of structural. This theme is part of a share in the context of work carried Spintec and dedicated to research of new materials with high added value industries (information storage on ultra-high density of discrete media for example). It registers on the other hand in strengthening links between basic research (CNRS own laboratories as Neel Institute) and applied (ECA), with strong skills in use of structural and magnetic characterization of the Institute Neel.
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Submitted on : Monday, July 30, 2012 - 11:42:17 AM
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  • HAL Id : tel-00721760, version 1

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Houmed Mohamed Garad. L'anisotropie magnétique perpendiculaire induite par oxydation et recuit thermique : de la structure au magnétisme. Autre [cond-mat.other]. Université de Grenoble, 2012. Français. ⟨NNT : 2012GRENY016⟩. ⟨tel-00721760⟩

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