Janda, T. and Ostatnicky, T. and Nemec, P. and Schmoranzerova, E. and Campion, R. and Hills, V. and Novak, V. and Soban, Z. and Wunderlich, J. (2022) Ultrashort spin-orbit torque generated by femtosecond laser pulses. SCIENTIFIC REPORTS, 12 (1): 21550. ISSN 2045-2322
Full text not available from this repository. (Request a copy)Abstract
To realize the very objective of spintronics, namely the development of ultra-high frequency and energy-efficient electronic devices, an ultrafast and scalable approach to switch magnetic bits is required. Magnetization switching with spin currents generated by the spin-orbit interaction at ferromagnetic/non-magnetic interfaces is one of such scalable approaches, where the ultimate switching speed is limited by the Larmor precession frequency. Understanding the magnetization precession dynamics induced by spin-orbit torques (SOTs) is therefore of great importance. Here we demonstrate generation of ultrashort SOT pulses that excite Larmor precession at an epitaxial Fe/GaAs interface by converting femtosecond laser pulses into high-amplitude current pulses in an electrically biased p-i-n photodiode. We control the polarity, amplitude, and duration of the current pulses and, most importantly, also their propagation direction with respect to the crystal orientation. The SOT origin of the excited Larmor precession was revealed by a detailed analysis of the precession phase and amplitude at different experimental conditions.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | INJECTION |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Prof. Jörg Wunderlich |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 15 Feb 2024 11:27 |
| Last Modified: | 15 Feb 2024 11:27 |
| URI: | https://pred.uni-regensburg.de/id/eprint/57601 |
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