HdR defense
(in french)
C2N site Orsay, salle 44, Orsay CedexHdR defense
(in french)
C2N site Marcoussis, Salle R. Planel, MarcoussisHdR defense
Noise, chirality, and chaos in the dynamics of magnons and magnetic solitons
C2N site Orsay, salle 44, Orsay CedexHdR defense
Composition du jury proposé
Hans-Benjamin BRAUN – Rapporteur – University College Dublin
Ursula EBELS – Rapporteur – Spintec, Grenoble
Jan VOGEL – Rapporteur – Institut Néel, Grenoble
Claude CHAPPERT – Examinateur – Centre de Nanosciences et de Nanotechnologies, Orsay
Thibaut DEVOLDER – Examinateur – Centre de Nanosciences et de Nanotechnologies, Orsay
Eric FULLERTON – Examinateur – University of California at San Diego
Claudio SERPICO – Examinateur – Università di Napoli "Federico II"
André THIAVILLE – Examinateur – Laboratoire de Physique des Solides, Orsay
Résumé
Nanoscale magnetism offers a rich playground for studying nonlinear phenomena. I will discuss work I have undertaken on the stochastic theory of spin-torque nano-oscillators, nanocontact vortex oscillators including chaotic phases, channelling and nonreciprocal spin wave propagation in chiral systems, thermally-driven domain wall processes, and skyrmion dynamics. I conclude with some perspectives that follow from this research, namely chaos-based information processing, time-delay phenomena in micromagnetism, and stochastic processes in chiral magnets.
On-Chip Micro/nanorobotic Swimmers Toward Biological Applications
C2N - Site Marcoussis, C2N site Marcoussis, salle R. Planel, NozayHdR defense
Rapporteurs :
Peer Fischer, Max Planck Institute, Germany
Abdul Barakat, LadHyX, CNRS, Ecole Polytechnique, Palaiseau
Catherine Villard, IPGG, CNRS, Université Paris Sciences et Lettres
Examinateurs :
Isabelle Sagnes, C2N, CNRS, Université Paris-Saclay, Marcoussis
Anne-Marie Haghiri-Gosnet, C2N, CNRS, Université Paris-Saclay, Marcoussis
Giulia Manina, Institut Pasteur, Paris
Séverine Le Gac, University of Twente, The Netherlands
Résumé :
Micro/nanorobotic swimmers can serve as alternative microfluidic tools toward biologic or biomedical applications. We aim to develop highly energy efficient and fully controllable on-chip micro/nanorobotic swimmers with remote controlled functions such as cargo transport and sensing. In this presentation, I will introduce our recently developed micro/nanorobotic swimmers including their fabrications by two-photon laser 3D nanolithography, force characterizations and their microfluidics applications. Two applications to simulate their future in-vivo and lab-on-a-chip applications are demonstrated. First, the micro/nanorobotic swimmer serves as mobile micromanipulator inside microfluidic device to transport microscale objects. Second, we demonstrate their physical sensing applications inside microfluidic control platform.