In Ta/FeCoB/TaOx, it was demonstrated that the Dzyaloshinskii-Moriya interaction (DMI) chirality can undergo modification solely in response to variations in the thickness of the ferromagnetic layer. This inversion of chirality is attributed to variations in orbital filling and interatomic distances at the interface, driven by the structural relaxations in the ultrathin regime. This method provides […]

Van der Waals magnets are typically limited to low-temperature and multilayer form. Here, we first demonstrated room-temperature ferromagnetism in thicker Co-doped Fe₅GeTe₂ films, then achieved ferromagnetism up to ∼200 K in epitaxial monolayers, a breakthrough for two-dimensional spintronics. Two-dimensional (2D) van der Waals (vdW) magnets are highly sought after for their potential in spintronics. Their […]

Position: We are opening a postdoctoral research position to perform spin-wave spectroscopy on a home-built NV-center microscope. The scientific goal is to exploit the exquisite sensitivity of the instrument to map the spatio-temporal profile of otherwise hidden azimuthal modes. Our long-term objective is to develop a high-performance orbital-angular-momentum transducer between photons, magnons, and phonons, using […]

On September 22th at 14:00, Abderrazak Hakam (SPINTEC) will defend his PhD thesis entitled : Control of the stochastic phase dynamics of spin-torque nano-oscillators for unconventional computing Place : amphi M001 à Phelma, 3 Parvis Louis Neel video conference : https://univ-grenoble-alpes-fr.zoom.us/j/98769867024?pwd=dXNnT3RMeThjYStybGVQSUN0TVdJdz09 Meeting ID: 987 6986 7024 Passcode: 025918 Abstract : As computational problems grow in size […]

Spin waves are propagating fundamental excitations of magnetic systems, also carrying promises for low-power logic and data transfer. We report the measurement of thermal spin-wave spectra in single cylindrical nanowires, and their quantitative analysis as modes with a radial and azimuthal index. This opens the route for more elaborate investigations including generation, manipulation and detection. […]

Position: The project FLUSPIN is opening a 12-month position (possible extensions) for a postdoctoral researcher to explore the integration of Kramers-type thermal activation theories—validated for equilibrium conditions in superparamagnetic systems—with a functional calculus approach. This approach extends the Fokker-Planck equation (FPE) to magnetization dynamics under colored noise, moving beyond the usual Markovian approximations. By incorporating […]

Angular momentum (AM) is the conserved quantity associated with rotational invariance. Harnessing its orbital component in axi-symmetric sample is often challenging. Interestingly, we show that azimuthal spin waves in normally magnetized disks are largely immune to imperfections that would otherwise prevent the wavefront from orbiting around the disk. * “And yet it moves!” is the […]

Magnetically driven microparticles provide a versatile platform for probing and manipulating biological systems. Yet the physical framework governing their actuation in complex environments remains only partially explored. In this work, we introduced a simplified model describing the magneto-mechanical response of such particles embedded in viscoelastic media under varying magnetic fields. For several years now, the […]

Spin–orbit-torque (SOT) MRAM writing exhibits an unusual current dependence: at high current amplitudes, the write probability can drop to zero or even oscillate as the current increases. In collaboration with Antaios, we showed that this behavior originates from an intrinsic, largely deterministic back-switching mechanism, and we demonstrated that tailoring the pulse fall time significantly widens […]

Magnetic field sensors are widely used for contactless current measurement, as well as in the automotive and robotics industries for position encoding. Vortex sensors are particularly attractive for these applications because of their linear response and weak temperature dependence. Conventional vortex sensors are sensitive to magnetic fields applied in the sensor plane. We developed a […]