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Fundamental Research Division
The DRF at the CEA assemble approximately 6,000 scientists since January 2016.
Images from the MegaCam camera developed at the Irfu reveal previously unexpected, extended structures within a group of galaxies called Stephan’s Quintet. These structures demonstrate long-standing interactions between galaxies, indicating that the group is much older than models have predicted.
Thanks to progress in lithography techniques, new so-called “lateral” architectures are emerging in spintronics. Far more versatile and just as powerful as the current devices, they are opening up important prospects for memory and logic applications. It’s time to get creative!
When exposed to low-energy ultraviolet radiation, the extremities of chromosomes (or telomeres) can produce radicals that cause oxidative damage. A detailed study using time-resolved spectroscopy conducted at the Iramis reveals the mechanisms associated with these processes.
Discovered in February 2017, the seven planets of the dwarf star Trappist-1 are a favored subject of study as they are located only forty light-years from us. According to two studies that included the participation of an Irfu researcher, several of these planets have atmospheres that no longer contain hydrogen. Moreover, the planet closest to the star contains a considerable amount of water, 50 times more than the Earth in proportion to its mass. This last point particularly brings into question the current models.
By combining an atom and a molecule on a surface with the help of a microscope using the tunnel effect, it is possible to construct a nano-object whose electronic and mechanical properties can be modulated according to the relative positions of the atom and the molecule. The diversity of properties obtained demonstrates the promising potential of this “trapping chemistry”.
A molecule proves to reduce the sensitivity of cells to many particularly aggressive toxins and viruses. Scientists from the CEA’s Institut Frédéric-Joliot have deciphered this protection mechanism.
A radio frequency transmission method patented at the Institut Frédéric-Joliot now makes it possible to remove artifacts present on 3-Tesla images of large organs.
Les propriétés magnétiques et électriques des jonctions tunnel magnétiques ont pu être améliorées significativement en insérant des couches de métal réfractaire (tungstène) dans les empilements. Cette avancée ouvre de belles perspectives aux mémoires magnétiques MRAM composées de telles jonctions et qui rentrent en production de volume.
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CEA is a French government-funded technological research organisation in four main areas: low-carbon energies, defense and security, information technologies and health technologies. A prominent player in the European Research Area, it is involved in setting up collaborative projects with many partners around the world.