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2 results for “skyrmions, spintronics”
Engineering skyrmions in transition-metal multilayers for spintronics
<p>Magnetic skyrmions are localized, topologically protected spin structures that have been<br> proposed for storing or processing information due to their intriguing dynamical and transport<br> properties. Important in terms of applications is the recent discovery of interface stabilized<br> skyrmions as evidenced in ultra-thin transition-metal films. However, so far only skyrmions at<br> interfaces with a single atomic layer of a magnetic material were reported, which greatly<br> limits their potential for application in devices. Here we predict the emergence of skyrmions<br> in [4d/Fe2/5d]n multilayers, that is, structures composed of Fe biatomic layers sandwiched<br> between 4d and 5d transition-metal layers. In these composite structures, the exchange<br> and the Dzyaloshinskii–Moriya interactions that control skyrmion formation can be tuned<br> separately by the two interfaces. This allows engineering skyrmions as shown based on<br> density functional theory and spin dynamics simulations.</p>
Images for "Nano-scale magnetic skyrmions in metallic films and multilayers: a new twist for spintronics"
<p>Magnetic skyrmions are chiral quasiparticles that show promise for the transportation and storage of information. On a fundamental level, skyrmions are model systems for topologically protected spin textures and can be considered as the counterpart of topologically protected electronic states, emphasizing the role of topology in the classification of complex states of condensed matter. Recent impressive demonstrations of control of individual nanometer-scale skyrmions—including their creation, detection, manipulation and deletion—have raised expectations for their use in future spintronic devices, including magnetic memories and logic gates. From a materials perspective, it is remarkable that skyrmions can be stabilized in ultrathin transition metal films, such as Fe—one of the most abundant elements on earth—if these are in contact with materials that exhibit high spin-orbit coupling. At present, research in this field is focused on the development of transition-metal-based magnetic multilayer structures that support skyrmionic states at room temperature and allow for precise control of skyrmions by spin-polarized currents and external fields.</p>
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