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High temperature ferromagnetism in epitaxial monolayers of Co-doped Fe5GeTe2
Jules Courtin, Fatima Ibrahim, Davide Benettin +14
Magnetic van der Waals materials have mainly been investigated in their bulk form or as few-layers flakes. Due to the challenges in producing atomically thin films, only a few have…
Thickness-Dependent Spintronic Terahertz Emission in MBE-Grown PtTe: From Semiconductor to Type-II Dirac Semimetal
Rahul Sharma, Sylvain Massabeau, Armando Pezo +13
Spintronic terahertz (THz) emitters have established themselves as among the most practical broadband THz sources available, yet their performance remains fundamentally limited by…
Dzyaloshinskii-Moriya interaction chirality reversal with ferromagnetic thickness
Capucine Gueneau, Fatima Ibrahim, Johanna Fischer +10
In ultrathin ferromagnetic films sandwiched between two distinct heavy metal layers or between a heavy metal and an oxide layer, the Dzyaloshinskii-Moriya interaction (DMI) is of i…
Large Chiral Orbital Texture and Orbital Edelstein Effect in Co/Al Heterostructure
Sergey A. Nikolaev, Mairbek Chshiev, Fatima Ibrahim +6
Recent experiments by S. Krishnia et al., Nano Lett. 23, 6785 (2023) reported an unprecedentedly large enhancement of torques upon inserting thin Al layer in Co/Pt heterostructure…
Interfacial spin-orbitronic effects controlled with different oxidation levels at the Co|Al interface
Sachin Krishnia, Libor Vojáček, Tristan Da Câmara Santa Clara Gomes +15
Perpendicular magnetic anisotropy (PMA) and Dzyaloshinskii-Moriya interactions are key interactions in modern spintronics. These interactions are thought to be dominated by the oxi…
Giant Spin-Orbit Torque in Cr-based Janus Transition Metal Dichalcogenides
Libor Vojáček, Joaquín Medina Dueñas, Jing Li +5
We report a very large spin-orbit torque (SOT) capability of chromium-based transition metal dichalcogenides (TMD) in their Janus forms CrXTe, with X=S,Se. The structural inversion…
Domain wall migration-mediated ferroelectric switching and Rashba effect tuning in GeTe thin films
Libor Vojáček, Mairbek Chshiev, Jing Li
Germanium Telluride (GeTe), identified as a ferroelectric Rashba semiconductor, is a promising candidate for future electronic devices in computing and memory applications. However…
From Early Theories of Dzyaloshinskii-Moriya Interactions in Metallic Systems to Today's Novel Roads
Albert Fert, Mairbek Chshiev, André Thiaville +1
Since the early 1960's, the discovery of Dzyaloshinskii-Moriya interaction (DMI) helped to explain the physical mechanisms behind certain magnetic phenomena, such as net moment in…
Epitaxial van der Waals heterostructures of Cr2Te3 on 2D materials
Quentin Guillet, Libor Vojacek, Djordje Dosenovic +16
Achieving large-scale growth of two-dimensional (2D) ferromagnetic materials with high Curie temperature (TC) and perpendicular magnetic anisotropy (PMA) is highly desirable for th…
Gradient-induced Dzyaloshinskii-Moriya interaction
Jinghua Liang, Mairbek Chshiev, Albert Fert +1
The Dzyaloshinskii-Moriya interaction (DMI) that arises in the magnetic systems with broken inversion symmetry plays an essential role in topological spintronics. Here, by means of…
Multiferroic materials based on transition-metal dichalcogenides: Potential platform for reversible control of Dzyaloshinskii-Moriya interaction and skyrmion via electric field
Ziji Shao, Jinghua Liang, Qirui Cui +4
Exploring novel two-dimensional multiferroic materials that can realize electric-field control of two-dimensional magnetism has become an emerging topic in spintronics. Using first…
Skyrmions-based logic gates in one single nanotrack completely reconstructed via chirality barrier
Dongxing Yu, Hongxin Yang, Mairbek Chshiev +1
Logic gates based on magnetic elements are promising candidates for the logic-in-memory applications with nonvolatile data retention, near-zero leakage and scalability. In such spi…
Large-scale epitaxy of two-dimensional van der Waals room-temperature ferromagnet Fe5GeTe2
Mário Ribeiro, Giulio Gentile, Alain Marty +12
In recent years, two-dimensional van der Waals materials have emerged as an important platform for the observation of long-range ferromagnetic order in atomically thin layers. Alth…
Rashba-type Dzyaloshinskii-Moriya interaction, perpendicular magnetic anisotropy and skyrmion states at 2D materials/Co interfaces
Ali Hallal, Jinghua Liang, Fatima Ibrahim +3
We report a significant Dzyaloshinskii-Moriya interaction (DMI) and perpendicular magnetic anisotropy (PMA) at interfaces comprising hexagonal boron nitride (h-BN) and Co. By compa…
Current-driven domain wall dynamics in ferrimagnetic Ni-doped Mn4N films : very large domain wall velocities and reversal of motion direction across the magnetic compensation point
Sambit Ghosh, Taro Komori, Ali Hallal +11
Spin-transfer torque (STT) and spin-orbit torque (SOT) are spintronic phenomena allowing magnetization manipulation using electrical currents. Beyond their fundamental interest, th…
Unveiling temperature dependence mechanisms of perpendicular magnetic anisotropy at Fe/MgO interfaces
Fatima Ibrahim, Ali Hallal, Alan Kalitsov +3
The perpendicular magnetic anisotropy (PMA) at magnetic transition metal/oxide interfaces is a key element in building out-of-plane magnetized magnetic tunnel junctions for spin-tr…
Giant perpendicular magnetic anisotropy enhancement in MgO-based magnetic tunnel junction by using Co/Fe composite layer
Libor Vojáček, Fatima Ibrahim, Ali Hallal +2
Magnetic tunnel junctions with perpendicular anisotropy form the basis of the spin-transfer torque magnetic random-access memory (STT-MRAM), which is non-volatile, fast, dense, and…
Temperature dependence of transport mechanisms in organic multiferroic tunnel junctions
Can Xiao, Huawei Sun, Luming Cheng +14
Organic multiferroic tunnel junctions (OMFTJs) with multi-resistance states have been proposed and drawn intensive interests due to their potential applications, for examples of me…
Nitrogen magneto-ionics
Julius de Rojas, Alberto Quintana, Aitor Lopeandía +15
So far, magneto-ionics, understood as voltage-driven ion transport in magnetic materials, has largely relied on controlled migration of oxygen ion/vacancy and, to a lesser extent,…
Reversible control of Dzyaloshinskii-Moriya interaction at graphene/Co interface via hydrogen absorption
Baishun Yang, Qirui Cui, Jinghua Liang +2
Using first-principles calculations, we investigate the impact of hydrogenation on the Dzyaloshinskii-Moriya interaction (DMI) at graphene/Co interface. We find that both the magni…
Unveiling multiferroic proximity effect in graphene
Fatima Ibrahim, Ali Hallal, Daniel Solis Lerma +3
We demonstrate that electronic and magnetic properties of graphene can be tuned via proximity of multiferroic substrate. Our first-principles calculations performed both with and w…
Very large Dzyaloshinskii-Moriya interaction in two-dimensional Janus manganese dichalcogenides and its application to realize skyrmion states
Jinghua Liang, Weiwei Wang, Haifeng Du +5
The Dzyaloshinskii-Moriya interaction (DMI), which only exists in noncentrosymmetric systems, is responsible for the formation of exotic chiral magnetic states. The absence of DMI…
Large voltage tuning of Dzyaloshinskii-Moriya Interaction: a route towards dynamic control of skyrmion chirality
Titiksha Srivastava, Marine Schott, Roméo Juge +14
Electric control of magnetism is a prerequisite for efficient and low power spintronic devices. More specifically, in heavy metal/ ferromagnet/ insulator heterostructures, voltage…
Large enhancement of the spin Hall effect in Au by scattering with side-jump on Ta impurities
P. Laczkowski, Y. Fu, H. Yang +16
We present measurements of the Spin Hall Effect (SHE) in AuW and AuTa alloys for a large range of W or Ta concentrations by combining experiments on lateral spin valves and Ferroma…