Abstract：
:Topologically distinct magnetic structures like skyrmions, domain walls, and the uniformly magnetized state have multiple applications in logic devices, sensors, and as bits of information. One of the most promising concepts for applying these bits is the racetrack architecture controlled by electric currents or magnetic driving fields. In state-of-the-art racetracks, these fields or currents are applied to the whole circuit. Here, we employ micromagnetic and atomistic simulations to establish a concept for racetrack memories free of global driving forces. Surprisingly, we realize that mixed sequences of topologically distinct objects can be created and propagated over far distances exclusively by local rotation of magnetization at the sample boundaries. We reveal the dependence between chirality of the rotation and the direction of propagation and define the phase space where the proposed procedure can be realized. The advantages of this approach are the exclusion of high current and field densities as well as its compatibility with an energy-efficient three-dimensional design.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Schäffer AF,Siegl P,Stier M,Posske T,Berakdar J,Thorwart M,Wiesendanger R,Vedmedenko EYdoi
10.1038/s41598-020-77337-ysubject
Has Abstractpub_date
2020-11-23 00:00:00pages
20400issue
1issn
2045-2322pii
10.1038/s41598-020-77337-yjournal_volume
10pub_type
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pub_type： 临床试验,杂志文章
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