| Spin-orbit torque driven field-free artificial synapses and neurons PN-III-P4-ID-PCE-2020-1853 No. 182/04/01/2021 |
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Sumary of main results: |
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In the field of spintronics electrical currents can be used to control the magnetic properties of materials. In our project, we explored the spin-orbit torques (SOTs) induced by these currents to manipulate magnetic structures without relying on external magnetic fields. We focused on a combination of SOTs and another effect known as the interfacial Dzyaloshinskii-Moriya interaction (iDMI), which creates unique magnetic textures like chiral domain walls and skyrmions. Our goal was to use these effects to build artificial synapses and neurons. We designed ultrathin magnetic structures and used various experimental techinques to understand their properties, like second harmonic Hall experiments and Brillouin light spectroscopy and Kerr effect microscopy. One of the exciting outcomes was the creation of artificial synapses that function similarly to the connections in our brains . These synapses exhibited memory-like behavior and could change their strength over time, emulating the way our brains learn and adapt. We also developed a neuron-like device that mimics the basic functionality of a biological neuron, showcasing the potential for future brain-inspired computing. In essence, our work opens up new possibilities for creating advanced computing devices that operate more efficiently and resemble the complexity of our own brains. It's a step towards a future where technology and biology seamlessly integrate for groundbreaking innovations. |
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Articles: |
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| Thickness dependence of magnetic properties of Ir/FeV-based systems, D Ourdani, Y Roussigné, SM Chérif, MS Gabor, M Belmeguenai Phys. Rev. Materials , 7, 034408 (2023) https://doi.org/10.1103/PhysRevMaterials.7.034408 | |||||
| Magnetic Damping and Dzyaloshinskii–Moriya Interactions in Pt/Co2FeAl/MgO Systems Grown on Si and MgO Substrates, N Challab, Y Roussigné, SM Chérif, MS Gabor, M Belmeguenai, Materials , 16, 1388 (2023) https://doi.org/10.3390/ma16041388 |
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Theoretical Investigation of Skyrmion Dynamics in Pt/Co/MgO Nanodots, D Ourdani, M Belmeguenai, MS Gabor, A Stashkevich, YRoussigné Materials , 15, 7474 (2022) (view pdf) https://doi.org/10.3390/ma15217474 |
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| Correlation between interface perpendicular magnetic anisotropy and interfacial Dzyaloshinskii–Moriya interactions in Pt/Pd/Co/Au, D Ourdani, Y Roussigné, SM Chérif, MS Gabor, M Belmeguenai Journal of Physics D: Applied Physics , 55, 485004 (2022) (view pdf) https://doi.org/10.1088/1361-6463/ac94875 |
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| Mechanism of Spin-Orbit Torques in Platinum Oxide Systems, J Nath, AV Trifu, MS Gabor, A Hallal, S Auffret, S Labau, A Mahjoub, E Chan, AK Chaurasiya, AK Mondal, H Yang, E Schmoranzerova, MA Nsibi, I Joumard, A Barman, B Pelissier, M Chshiev, G Gaudin, IM Miron Adv. Electron. Mater. , 2101335(2022) (view pdf) https://doi.org/10.1002/aelm.202101335 |
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| Effect of Chiral Damping on the dynamics of chiral domain walls and skyrmions, -
CK Safeer, M-A Nsibi, J Nath, MS Gabor, H Yang, I Joumard, S Auffret, G Gaudin, I-M Miron (view pdf) Nature Communications , 13, 1192(2022) |
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| Dependence of the interfacial Dzyaloshinskii-Moriya interaction, perpendicular magnetic anisotropy, and damping in Co-based systems on the thickness of Pt and Ir layers, -
D. Ourdani, Y. Roussigné, S. M. Chérif, M. S. Gabor, and M. Belmeguenai (view pdf) Phys. Rev. B 104, 104421 (2021) |
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| Annealing Temperature and Thickness Dependencies of Perpendicular Magnetic Anisotropy and Dzyaloshinskii-Moriya Interaction of Pt/Co/MgO thin films, -
D. Ourdani; Y. Roussigné; S. M. Chérif; M. Gabor; M. Belmeguenai (view pdf) IEEE Trans. on Magn., (2021), 10.1109/TMAG.2021.3089002) |
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| Hf thickness dependence of perpendicular magnetic anisotropy, damping and interfacial Dzyaloshinskii-Moriya interaction in Pt/CoFe/Hf/HfO2, -
D. Ourdani, Y. Roussigné, R. B. Mos, M. Nasui, S. M. Chérif, M. S. Gabor, M. Belmeguenai (view pdf) Phys. Rev. Materials 5, 084404 (2021) |
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| Conferences: | |||||
Asymmetric Diode-Like Behaviour Controlled by Geometry in Current Induced Spin-Orbit Torque Driven Domain Wall Devices, EM Stetco, T Petrisor, O Pop, IM Miron, MS Gabor, Joint European Magnetic Symposia 2023, Madrid, Spain - Best poster finalist award Bulk and interface spin-orbit torques in Pt/Co/MgO structures, MS Gabor, TPetrisor, MBelmeguenai, IM Miron, Joint European Magnetic Symposia 2023, Madrid, Spain - oral presentation Micromagnetic Simulations of Spin-Orbit Torque Driven Domain Wall Based Memristor Devices, EM Stetco, T Petrisor, O Pop, IM Miron, MS Gabor, Joint European Magnetic Symposia 2022, Warsaw, Poland - oral presentation |
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| Bulk and interface spin-orbit torques in Pt/Co/MgO structures, MS Gabor, Spins, waves and interactions workshop 2022, Greifswald, Germany - invited presentation | |||||
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