345 citations · 1.8k across the 25 of their papers we have counts for
18 papers · 1 filter
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…
Coexistence of ferromagnetism and spin-orbit coupling by incorporation of platinum in two-dimensional VSe
E. Vélez-Fort, A. Hallal, R. Sant +20
We report on a novel material, namely two-dimensional (2D) VPtSe alloy, exhibiting simultaneously ferromagnetic order and Rashba spin-orbit coupling. While ferromag…
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…
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…
Tailoring magnetic insulator proximity effects in graphene: First-principles calculations
A. Hallal, F. Ibrahim, H. X. Yang +2
We report a systematic first-principles investigation of the influence of different magnetic insulators on the magnetic proximity effect induced in graphene. Four different magneti…
Giant variation of the perpendicular magnetic anisotropy at Fe/MgO interfaces by oxygen migration: a first-principles study
F. Ibrahim, A. Hallal, B. Dieny +1
A characteristic dependence of voltage control of perpendicular magnetic anisotropy (VCMA) on oxygen migration at Fe/MgO interfaces was revealed by performing systematic {\it ab in…
Direct evidence for minority spin gap in the Co2MnSi Heusler alloy
Stéphane Andrieu, Amina Neggache, Thomas Hauet +6
Half Metal Magnets are of great interest in the field of spintronics because of their potential full spin-polarization at the Fermi level and low magnetization damping. The high Cu…
Anatomy and giant enhancement of the perpendicular magnetic anisotropy of cobalt-graphene heterostructures
Hongxin Yang, Anh Duc Vu, Ali Hallal +5
We report strongly enhanced perpendicular magnetic anisotropy (PMA) of Co films by graphene coating from both first-principles and experiments. Our calculations show that graphene…
Origin of interfacial perpendicular magnetic anisotropy in MgO/CoFe/metallic capping layer structures
Shouzhong Peng, Mengxing Wang, Hongxin Yang +9
Spin-transfer-torque magnetic random access memory (STT-MRAM) attracts extensive attentions due to its non-volatility, high density and low power consumption. The core device in ST…
Large and robust electrical spin injection into GaAs at zero magnetic field using an ultrathin CoFeB/MgO injector
S. Liang, T. T. Zhang, P. Barate +19
We demonstrate a large electrical spin injection into GaAs at zero magnetic field thanks to an ultrathin perpendicularly magnetized CoFeB contact of a few atomic planes (1.2 nm). T…
Impurity induced enhancement of perpendicular magnetic anisotropy in Fe/MgO tunnel junctions
A. Hallal, B. Dieny, M. Chshiev
Using first-principles calculations, we investigated the impact of chromium (Cr) and vanadium (V) impurities on the magnetic anisotropy and spin polarization in Fe/MgO magnetic tun…
First principles investigation of magnetocrystalline anisotropy at the L2 Full Heusler|MgO interfaces and tunnel junctions
Rajasekarakumar Vadapoo, Ali Hallal, Hongxin Yang +1
Magnetocrystalline anisotropy at Heusler alloyMgO interfaces have been studied using first principles calculations. It is found that Co terminated CoFeAlMgO interfaces…
Anatomy of perpendicular magnetic anisotropy in Fe/MgO magnetic tunnel junctions: First principles insight
A. Hallal, H. X. Yang, B. Dieny +1
Using first-principles calculations, we elucidate microscopic mechanisms of perpendicular magnetic anisotropy (PMA)in Fe/MgO magnetic tunnel junctions through evaluation of orbital…
Magnetic Insulator-Induced Proximity Effects in Graphene: Spin Filtering and Exchange Splitting Gaps
H. -X. Yang, A. Hallal, D. Terrade +3
We report on first-principles calculations of spin-dependent properties in graphene induced by its interaction with a nearby magnetic insulator (Europium oxide, EuO). The magnetic…