Transforming domain motion for 3D racetrack memory with perpendicular magnetic anisotropy
| Autor: | Syuta Honda, Yoshiaki Sonobe, Simon John Greaves |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Physics Acoustics and Ultrasonics Condensed matter physics Nanowire Motion (geometry) 02 engineering and technology Substrate (electronics) 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Loop (topology) Magnetic anisotropy 0103 physical sciences Domain (ring theory) Perpendicular Racetrack memory 0210 nano-technology |
| Zdroj: | Journal of Physics D: Applied Physics. 54:135002 |
| ISSN: | 1361-6463 0022-3727 |
| DOI: | 10.1088/1361-6463/abd060 |
| Popis: | Domain-wall motion type magnetic memories are expected to be among the next generation of magnetic recording devices and vertical-NAND memories. In particular, three-dimensional race track memory (3D-RM), which extends vertically from a substrate is important for high integration. We propose a vertical 3D-RM loop consisting of two horizontal and two vertical nanowires in which the magnetic anisotropy is perpendicular to the substrate. The horizontal nanowires contain perpendicularly magnetized domains and Néel type domain walls (DWs). The vertical nanowires contain longitudinally magnetized domains with head-to-head or tail-to-tail DWs. DW motion is demonstrated using micromagnetic simulations based on the Landau–Lifshitz–Gilbert equation. We find that a DW can pass around a corner while deforming its own shape. The threshold current density to push a DW around a corner has a maximum value for wire thickness of about 10 nm. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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