Spin–orbit torque switching of a ferromagnet with picosecond electrical pulses
| Autor: | Xinping Shi, Elodie Martin, Richard Wilson, Aldo Ygnacio Arriola Córdova, Jon Gorchon, Sébastien Petit-Watelot, Juan-Carlos Rojas-Sánchez, Gregory Malinowski, Jeffrey Bokor, Kaushalya Jhuria, Aristide Lemaître, Michel Hehn, Stéphane Mangin, Akshay Pattabi, Julius Hohlfeld, Roberto Lo Conte |
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| Přispěvatelé: | Institut Jean Lamour (IJL), Université de Lorraine (UL)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Department of Electrical Engineering and Computer Sciences (Berkeley EECS), University of California [Riverside] (UCR), University of California, Centre de Nanosciences et de Nanotechnologies [Marcoussis] (C2N), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2020 |
| Předmět: |
Magnetization dynamics
Materials science Kerr effect Spintronics business.industry Spin-transfer torque 02 engineering and technology 021001 nanoscience & nanotechnology 7. Clean energy 01 natural sciences Electronic Optical and Magnetic Materials Switching time Condensed Matter::Materials Science Magnetization Picosecond 0103 physical sciences Optoelectronics [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat] Electrical and Electronic Engineering 010306 general physics 0210 nano-technology business Instrumentation Ultrashort pulse |
| Zdroj: | Nature Electronics Nature Electronics, Springer Nature, 2020, ⟨10.1038/s41928-020-00488-3⟩ Nature Electronics, vol 3, iss 11 |
| ISSN: | 2520-1131 |
| DOI: | 10.1038/s41928-020-00488-3 |
| Popis: | The development of approaches that can efficiently control the magnetization of magnetic materials is central to the creation of fast and low-power spintronic devices. Spin transfer torque can be used to electrically manipulate magnetic order in devices, but is typically limited to nanosecond timescales. Alternatively, spin–orbit torque can be employed, and switching with current pulses down to ~200 ps has been demonstrated. However, the upper limit to magnetization switching speed remains unestablished. Here, we show that photoconductive switches can be used to apply 6-ps-wide electrical pulses and deterministically switch the out-of-plane magnetization of a common thin cobalt film via spin–orbit torque. We probe the ultrafast magnetization dynamics due to spin–orbit torques with sub-picosecond resolution using the time-resolved magneto-optical Kerr effect (MOKE). We also estimate that the magnetization switching consumes less than 50 pJ in micrometre-sized devices. The magnetization of a cobalt thin film can be reversed by spin–orbit torques using picosecond electrical pulses that are generated by photoconductive switches. |
| Databáze: | OpenAIRE |
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