Control of spin–orbit torque-driven domain nucleation through geometry in chirally coupled magnetic tracks
Year: 2024
Type: article
Abstract: The interfacial Dzyaloshinskii–Moriya interaction (DMI) can be exploited in magnetic thin films to realize lateral chirally coupled systems, providing a way to couple different sections of a magnetic racetrack and realize interconnected networks of magnetic logic gates. Here, we systematically investigate the interplay between spin–orbit torques, chiral coupling, and the device design in domain wall racetracks. We show that the current-induced domain nucleation process can be tuned between single-domain nucleation and repeated nucleation of alternate domains by changing the orientation of an in-plane patterned magnetic region within an out-of-plane magnetic racetrack. Furthermore, by combining experiments and micromagnetic simulations, we show that the combination of damping-like and field-like spin–orbit torques with DMI results in selective domain wall injection in one of two arms of a Y-shaped device depending on the current density. Such an element constitutes the basis of domain wall based demultiplexer, which is essential for distributing a single input to any one of the multiple outputs in logic circuits. Our results provide input for the design of reliable and multifunctional domain wall circuits based on chirally coupled interfaces.
Source: Applied Physics Letters
DOI: 10.1063/5.0224146
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Funders: European Commission, National Natural Science Foundation of China, Ministerio de Ciencia e Innovación, Junta de Castilla y León, Horizon 2020 Framework Programme, Agencia Estatal de Investigación, National Key Research and Development Program of China, National Natural Science Foundation of China-China Academy of General Technology Joint Fund for Basic Research
Awards: G1175115578, G1276317268, Magnetism and the effects of Electric Field, G2001806450, G210041235, G2107649824, G2161408835, G2188020438, G2262748287, G2601397997, G300979063, G3345895242, G3418218065, G3420780486, G34346518, G3480869486, G3681454997, G387506447, G4042783231, G425668148, G435169313, G4937468798, G5080475149, G5195188938, G5560776957, G5662792045, G6263961651, G6281504974, G6697506338, G683931746, G7084143925, G7169023097, G751615522, G7628805400, G7984235579, G8512683158, G9001174083
OpenAlex ID: W4402993061