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Univ. Paris-Saclay
Réflectométrie neutronique
Les réflectomètres du LLB
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Réflectométrie neutronique

Puit d'échantillon du réflectomètre PRISM

Deux réflectomètres sont disponibles au LLB :

- Le réflectomètre EROS (ou G3bis), d'usage générale, en particulier dédié à l'étude des liquides et d ela matière molle.

- Le réflectomètre PRISM, avec neutrons polarisés pour l'étude des couches minces magnétiques.

 
#536 - Màj : 19/12/2008
Voir aussi
F. Ott (LLB), collaboration : A. Tamion, P.-E. Berche, E. Talbot, C. Bordel and D. Blavette (Université de Rouen)
The magnetization of [Fe 3nm/Dy 2nm] multilayers has been studied. The samples were thermally evaporated under ultra-high vacuum at different substrate temperatures varying from 320 K to 870 K. In order to get the magnetization depth profile of these Transition Metal/Rare Earth (TM/RE) multilayers, an investigation of the structural, chemical, and magnetic properties was carried out.
BiFeO3 is a multiferroic materials in which ferroelectric and anti-ferromagnetic orders coexist well above room temperature (TN=643 K, TC=1093 K), with a high polarization (over 100 μC/cm2 [1]). We have shown at the LLB by neutron diffraction that these two order parameters interact and that the magnetization of the material can be modified by the application of an electric field.
Using conjugated polymers as the active materials in electronic and optoelectronic devices opens up the possibility of fabricating all-polymer devices using solution processing technologies. The fabrication of good quality field-effect transistors (FETs) is crucial to a number of polymer-based devices, such as active matrix displays and integrated circuits. Central to FET operation is the dielectric/semiconductor interface.

 

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