Magnetic skyrmions are small, topologically protected magnetic textures that can be manipulated and moved, making them promising for information storage and logic technologies. They are stabilized by chiral interactions, particularly the Dzyaloshinskii-Moriya interaction (DMI), which arises from spin-orbit coupling in non-centrosymmetric materials or at interfaces. Recent advances have enabled the stabilization of skyrmions at room temperature and their manipulation by electric currents, opening the door to practical applications. Skyrmions can be extremely small, with diameters in the nanometer range, and their solitonic nature allows them to behave as particles, enabling their use in devices such as memory and logic circuits.
Skyrmions have been observed in various magnetic thin films and multilayers, with significant progress in stabilizing them at room temperature. For example, in multilayers like (Ir/Co/Pt)×10, skyrmions are stabilized and can be moved by current, with velocities up to 100 m/s. The motion of skyrmions is governed by spin-transfer torques and can be controlled by the spin Hall effect. The current-induced motion of skyrmions has been demonstrated in several types of multilayers, including those with Pt/CoFeB/MgO and Ta/CoFeB/TaOx structures. The motion of skyrmions is influenced by their size, current density, and the presence of defects, with larger skyrmions requiring higher current densities for motion.
Skyrmions can be created and detected through various methods, including spin-polarized current injection, laser-induced nucleation, and electric field control. Detection techniques such as the topological Hall effect and non-collinear magnetoresistance allow for the electrical detection of individual skyrmions. The topological Hall effect, in particular, provides a way to detect skyrmions by measuring a transverse voltage induced by their topological structure.
The potential applications of magnetic skyrmions include skyrmion race track memory, skyrmion-based logic devices, skyrmion magnonic crystals, and skyrmion-based radiofrequency devices. These devices leverage the unique properties of skyrmions, such as their topological protection, small size, and solitonic nature, to enable high-density, low-energy information processing and storage. The development of these devices is still in progress, but recent advances suggest that skyrmions could play a significant role in future spintronic technologies.Magnetic skyrmions are small, topologically protected magnetic textures that can be manipulated and moved, making them promising for information storage and logic technologies. They are stabilized by chiral interactions, particularly the Dzyaloshinskii-Moriya interaction (DMI), which arises from spin-orbit coupling in non-centrosymmetric materials or at interfaces. Recent advances have enabled the stabilization of skyrmions at room temperature and their manipulation by electric currents, opening the door to practical applications. Skyrmions can be extremely small, with diameters in the nanometer range, and their solitonic nature allows them to behave as particles, enabling their use in devices such as memory and logic circuits.
Skyrmions have been observed in various magnetic thin films and multilayers, with significant progress in stabilizing them at room temperature. For example, in multilayers like (Ir/Co/Pt)×10, skyrmions are stabilized and can be moved by current, with velocities up to 100 m/s. The motion of skyrmions is governed by spin-transfer torques and can be controlled by the spin Hall effect. The current-induced motion of skyrmions has been demonstrated in several types of multilayers, including those with Pt/CoFeB/MgO and Ta/CoFeB/TaOx structures. The motion of skyrmions is influenced by their size, current density, and the presence of defects, with larger skyrmions requiring higher current densities for motion.
Skyrmions can be created and detected through various methods, including spin-polarized current injection, laser-induced nucleation, and electric field control. Detection techniques such as the topological Hall effect and non-collinear magnetoresistance allow for the electrical detection of individual skyrmions. The topological Hall effect, in particular, provides a way to detect skyrmions by measuring a transverse voltage induced by their topological structure.
The potential applications of magnetic skyrmions include skyrmion race track memory, skyrmion-based logic devices, skyrmion magnonic crystals, and skyrmion-based radiofrequency devices. These devices leverage the unique properties of skyrmions, such as their topological protection, small size, and solitonic nature, to enable high-density, low-energy information processing and storage. The development of these devices is still in progress, but recent advances suggest that skyrmions could play a significant role in future spintronic technologies.