Synthèse et étude d'hétérostructures diélectrique/magnétique dans des membranes d'alumine nanoporeuse
(2015)
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- Abstract
- Over the last decade, the rapid development of nanotechnology has promoted the emergence of novel miniaturized devices based on nanoobjects, leading thus to an increased demand for new nanomaterials with different structures and improved properties. In this context of integration, extensive researches are focused on multifunctional materials such as multiferroic materials and in particular, magnetoelectric heterostructures that combine both ferromagnetic and ferroelectric materials with coupled properties through interfaces and strain effects. These nanomaterials are attractive due to the possibility to generate a spontaneous polarization or magnetization by an applied magnetic and electric field respectively.They are promising candidates for applications in microwave devices, chemical sensors, high density data storage devices, light emitters, etc.. Magnetoelectric materials also provide tremendous attraction in biological and biomedical applications e.g. for hyperthermia processes used to treat cancer. Designing innovative architectures is thus a challenge in the field of magnetoelectric materials. In this thesis project, in order to promote theinterface coupling between ferroelectric and ferromagnetic phases, two strategies are followed for material design: i) 1-1 core-shell structure with ferromagnetic nanowires (1) inside ferroelectric nanotubes in a selfsupported tridimensionnal porous template (1) and ii) 1-3 structure where ferromagnetic nanowires (1) are supported on a substrate and embedded in a ferroelectric matrix (3).
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Citations
Sallagoïty, D. (2015). Synthèse et étude d’hétérostructures diélectrique/magnétique dans des membranes d’alumine nanoporeuse. https://hdl.handle.net/2078.5/185070