A spin torque meter with magnetic facet domains
| Autor: | Jun Woo Choi, Kyung Mee Song, Jungbum Yoon, D.Y. Kim, Kyoung-Woong Moon, Chanyong Hwang, Changsoo Kim, Byong Sun Chun, Dongseuk Kim |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Facet (geometry)
Magnetic domain Science General Physics and Astronomy 02 engineering and technology 01 natural sciences General Biochemistry Genetics and Molecular Biology 0103 physical sciences Torque 010306 general physics Spin (physics) lcsh:Science Physics Multidisciplinary Spintronics Condensed matter physics General Chemistry 021001 nanoscience & nanotechnology Magnetic field Magnet Condensed Matter::Strongly Correlated Electrons lcsh:Q Astrophysics::Earth and Planetary Astrophysics Current (fluid) 0210 nano-technology |
| Zdroj: | Nature Communications, Vol 9, Iss 1, Pp 1-8 (2018) |
| ISSN: | 2041-1723 |
| Popis: | Current-induced magnetic domain wall (DW) motion is an important operating principle of spintronic devices. Injected current generates spin torques (STs) on the DWs in two ways. One is the spin transfer from magnetic domains to the walls by the current flowing in the magnet. Current flow in attached heavy metals also generates another ST because of the spin-Hall effect. Both phenomena explain the wall motions well; therefore, their respective contribution is an important issue. Here, we show the simultaneous measurement of both torques by using magnetic facet domains that form mountain-shaped domains with straight walls. When the STs and the external magnetic field push the walls in opposite directions, the walls should have equilibrium angles to create balanced states. Such angles can be modulated by an additional in-plane magnetic field. Angle measurements distinguish the STs because each torque has a distinct mechanism related to the DW structure. |
| Databáze: | OpenAIRE |
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