A5107230392- Multiferroics and related materials
- Magnetic and transport properties of perovskites and related materials
- Magnetic properties of thin films
- Ferroelectric and Piezoelectric Materials
- Magneto-Optical Properties and Applications
- Electronic and Structural Properties of Oxides
- Atomic and Subatomic Physics Research
- Topological Materials and Phenomena
- Numerical methods in engineering
- Iron oxide chemistry and applications
- Electromagnetic Scattering and Analysis
- Mechanical and Optical Resonators
- X-ray Diffraction in Crystallography
- Physics of Superconductivity and Magnetism
- Advanced Condensed Matter Physics
- Terahertz technology and applications
- Surface Roughness and Optical Measurements
- Quantum and electron transport phenomena
Centre National de la Recherche Scientifique
2016-2024
CEA Paris-Saclay
2016-2024
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2016-2024
Université Paris-Saclay
2016-2024
Service de Physique de l'État Condensé
2024
Synchrotron soleil
2021
Direction des énergies
2020
Institut Rayonnement-Matière de Saclay
2020
Abstract Antiferromagnetic thin films are currently generating considerable excitement for low dissipation magnonics and spintronics. However, while tuneable antiferromagnetic textures form the backbone of functional devices, they virtually unknown at submicron scale. Here we image a wide variety spin in multiferroic BiFeO 3 that can be tuned by strain manipulated electric fields through room-temperature magnetoelectric coupling. Using piezoresponse force microscopy scanning NV magnetometry...
Spin-to-charge conversion using the inverse Rashba-Edelstein effect is measured in 2D electron liquid existing at interface between LaAlO3 and SrTiO3. The found to be larger than highly Rashba split Bi/Ag which we attribute an amplifying due a long carrier's momentum lifetime. explanation supported by temperature measurements field also shown anisotropic plane.
We report on the formation of topological defects emerging from cycloidal antiferromagnetic order at surface bulk BiFeO_{3} crystals. Combining reciprocal and real-space magnetic imaging techniques, we first observe, in a single ferroelectric domain, coexistence domains which cycloid propagates along different wave vectors. then show that direction these vectors is not strictly locked to preferred crystallographic axes as continuous rotations bridge At junctions between domains, observe line...
NiO is a prototypical antiferromagnet with characteristic resonance frequency in the THz range. From atomistic spin dynamics simulations that take into account crystallographic structure of NiO, and particular magnetic anisotropy respecting its symmetry, we describe antiferromagnetic switching at by transfer torque mechanism. Sub-picosecond S-state between six allowed stable directions found for reasonably achievable currents, like those generated laser induced ultrafast demagnetization. A...
Mechanisms of spin/charge interconversion like the spin Hall effect can be used to generate and detect currents at timescales ranging from dc subpicosecond. In regime, best candidates are Rashba interfaces showing inverse Edelstein effect, with ${\mathrm{LaAlO}}_{3}/{\mathrm{SrTiO}}_{3}$ presenting a record conversion efficiency. At picosecond timescales, devices relying on efficient THz emitters, but this is less clear for Rashba-Edelstein systems. Here we study angular momentum into charge...
Spin/charge interconversion mechanisms provide an essential handle to generate and detect spin currents. Their applications at different timescales are critical in spintronics since they cover a technologically relevant broadband spectrum. While the inverse Hall effect is known be robust from quasi-static sub-picosecond timescales, conversion efficiency evolution of Edelstein has not been addressed yet. In this work, we report that while response can comparable most efficient systems,...
Insulating antiferromagnets are anticipated as the main protagonists of ultrafast spintronics, with their intrinsic terahertz dynamics and abililty to transport spin information over long distances. However, direct transfer angular momentum an antiferromagnetic insulator at picosecond time scales remains be demonstrated. Here, studying behaviour ferromagnetic metal/antiferromagnetic bilayers, we evidence generation coherent excitations in antiferromagnet combined a modulation demagnetization...
Antiferromagnetic thin films are currently generating considerable excitement for low dissipation magnonics and spintronics. However, while tuneable antiferromagnetic textures form the backbone of functional devices, they virtually unknown at submicron scale. Here we image a wide variety spin in multiferroic BiFeO3 that can be tuned by strain manipulated electric fields through room temperature magnetoelectric coupling. Using piezoresponse force microscopy scanning NV magnetometry...
Sonder la matière pour comprendre est certainement l’un des concepts les plus anciens de physique et science matériaux. Quand systèmes étudiés présentent ordres complexes, l’optique non-linéaire, en particulier génération seconde harmonique, une approche choix révéler propriétés remarquables telles que le couplage d’ordres ferroïques dans matériaux dits « multiferroïques ».