Abstract Magnetic skyrmions are prime candidates for future spintronic devices. However, incorporating them as information carriers hinges on their interaction with defects ubiquitous in any device. Here we map from first-principles, the energy profile of single interacting single-atom impurities, establishing a generic shape function defect’s electron filling. Depending chemical nature, foreign 3 d and 4 transition metal adatoms or surface implanted can either repel pin PdFe/Ir(111) thin...

Abstract Antiferromagnetic (AFM) skyrmions are envisioned as ideal localized topological magnetic bits in future information technologies. In contrast to ferromagnetic (FM) skyrmions, they immune the skyrmion Hall effect, might offer potential terahertz dynamics while being insensitive external fields and dipolar interactions. Although observed synthetic AFM structures complex meronic textures intrinsic bulk materials, their realization non-synthetic films, of crucial importance racetrack...

Chirality and topology are intimately related fundamental concepts, which heavily explored to establish spin-textures as potential magnetic bits in information technology. However, this ambition is inhibited since the electrical reading of chiral attributes highly non-trivial with conventional current perpendicular-to-plane (CPP) sensing devices. Here we demonstrate from extensive first-principles simulations multiple scattering expansion emergence spin-mixing magnetoresistance (C-XMR)...

Resting on multi-scale modelling simulations, we explore dynamical aspects characterizing magnetic skyrmions driven by spin-transfer-torque towards repulsive and pinning 3

Abstract Understanding interactions of magnetic textures with defects is crucial for applications such as racetrack memories or microwave generators. Such appear on the few nanometer scale, where imaging has not yet been achieved controlled external forces. Here, we establish a method determining via spin-polarized scanning tunneling microscopy in three-dimensional fields. We track vortex core, pushed by forces in-plane fields, and discover that core (~ 10 4 Fe-atoms) gets successively...

Abstract Magnetic skyrmions are prime candidates as information carriers for spintronic devices due to their topological nature and nanometric size. However, unavoidable inhomogeneities inherent any material leads pinning or repulsion of that, in analogy biology concepts, define the phenotype skyrmion-defect interaction, generating complexity motion challenging application future bits information. Here, we demonstrate that atom-by-atom manufacturing multi-atomic defects, being...

Abstract The viability of past, current and future devices for information technology hinges on their sensitivity to the presence impurities. latter can reshape extrinsic Hall effects or efficiency magnetoresistance effects, essential spintronics, lead resistivity anomalies, so-called Kondo effect. Here, we demonstrate that atomic defects enable highly efficient all-electrical detection spin-swirling textures, in particular magnetic skyrmions, which are promising bit candidates spintronics...

Abstract We present a systematic first-principles study of the electronic surface states and resonances occuring in thin films Pd various thicknesses deposited on single ferromagnetic monolayer (ML) Fe top Ir(111) substrate. This system is interest since one layer Fe/Ir(111) hosts small magnetic skyrmions. The latter are topological objects with swirling spin-textures possible implications context spintronic devices they have potential to be used as bits for information technology....

Skyrmions are spin-swirling textures hosting wonderful properties with potential implications in information technology. Such magnetic particles carry a magnetization, whose amplitude is crucial to establish them as robust bits, while their topological nature gives rise plethora of exquisite features such protection, the skyrmion and Hall effects well orbital moment. These all induced by an emergent field directly proportional three-spin scalar chirality, $\chi=...

In this work, we theoretically study the spin-dependent transport in a magnetic tunnel junction (MTJ). Using simple model and ballistic transport, polarization of tunneling current on system is studied by focusing s d electrons. We investigate these electrons through potential barriers, which represents insulating layer between ferromagnetic electrodes. also examine how conductance depends voltage applied electrodes effective mass The controlled transmission coefficient effect, qualitatively...

The viability of past, current and future devices for information technology hinges on their sensitivity to the presence impurities. latter can lead resistivity anomalies, so-called Kondo effect, reshape extrinsically Hall effects or reduce efficiency magnetoresistance essential in spintronics. Here we demonstrate that atomic defects enable highly efficient all-electrical detection spin-swirling textures, particular magnetic skyrmions, which are promising bits candidates spintronics devices....