{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,16]],"date-time":"2026-10-16T15:50:29Z","timestamp":1792165829870,"version":"4.4.0"},"reference-count":34,"publisher":"American Association for the Advancement of Science (AAAS)","issue":"36","content-domain":{"domain":["www.science.org"],"crossmark-restriction":true},"short-container-title":["Sci. Adv."],"published-print":{"date-parts":[[2023,9,8]]},"abstract":"<jats:p>Electrically controllable nonvolatile magnetic memories show great potential for the replacement of conventional semiconductor-based memory technologies. Here, we experimentally demonstrate ultrafast spin-orbit torque (SOT)\u2013induced coherent magnetization switching dynamics in a ferromagnet. We use an ultrafast photoconducting switch and a coplanar strip line to generate and guide a ~9-picosecond electrical pulse into a heavy metal\/ferromagnet multilayer to induce ultrafast SOT. We then use magneto-optical probing to investigate the magnetization dynamics with sub-picosecond resolution. Ultrafast heating by the approximately 9 picosecond current pulse induces a thermal anisotropy torque which, in combination with the damping-like torque, coherently rotates the magnetization to obtain zero-crossing of magnetization in ~70 picoseconds. A macro-magnetic simulation coupled with an ultrafast heating model agrees well with the experiment and suggests coherent magnetization switching without any incubation delay on an unprecedented time scale. Our work proposes a unique magnetization switching mechanism toward markedly increasing the writing speed of SOT magnetic random-access memory devices.<\/jats:p>","DOI":"10.1126\/sciadv.adh5562","type":"journal-article","created":{"date-parts":[[2023,9,6]],"date-time":"2023-09-06T17:59:12Z","timestamp":1694023152000},"update-policy":"https:\/\/doi.org\/10.34133\/aaas_crossmark","source":"Crossref","is-referenced-by-count":39,"title":["Picosecond spin-orbit torque\u2013induced coherent magnetization switching in a ferromagnet"],"prefix":"10.1126","volume":"9","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4828-1193","authenticated-orcid":true,"given":"Debanjan","family":"Polley","sequence":"first","affiliation":[{"name":"Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA."},{"name":"Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, CA 94720, USA."},{"name":"Department of Physics and Nanotechnology, SRM Institute of Science and Technology, Kattankulathur- 603 203, Tamil Nadu, India."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8195-9648","authenticated-orcid":true,"given":"Akshay","family":"Pattabi","sequence":"additional","affiliation":[{"name":"Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, CA 94720, USA."},{"name":"Department of Engineering, University of San\u00a0Francisco, San\u00a0Francisco CA 94117, USA."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ashwin","family":"Rastogi","sequence":"additional","affiliation":[{"name":"Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, CA 94720, USA."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9270-749X","authenticated-orcid":true,"given":"Kaushalya","family":"Jhuria","sequence":"additional","affiliation":[{"name":"Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA."},{"name":"Universit\u00e9 de Lorraine, CNRS, IJL, Nancy, France."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Eva","family":"Diaz","sequence":"additional","affiliation":[{"name":"Universit\u00e9 de Lorraine, CNRS, IJL, Nancy, France."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0915-1705","authenticated-orcid":true,"given":"Hanuman","family":"Singh","sequence":"additional","affiliation":[{"name":"Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, CA 94720, USA."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1892-9726","authenticated-orcid":true,"given":"Aristide","family":"Lemaitre","sequence":"additional","affiliation":[{"name":"Universit\u00e9 Paris-Saclay, CNRS, Centre de Nanosciences et de Nanotechnologies, 91120, Palaiseau, France."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4240-5925","authenticated-orcid":true,"given":"Michel","family":"Hehn","sequence":"additional","affiliation":[{"name":"Universit\u00e9 de Lorraine, CNRS, IJL, Nancy, France."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2578-0835","authenticated-orcid":true,"given":"Jon","family":"Gorchon","sequence":"additional","affiliation":[{"name":"Universit\u00e9 de Lorraine, CNRS, IJL, Nancy, France."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4541-0156","authenticated-orcid":true,"given":"Jeffrey","family":"Bokor","sequence":"additional","affiliation":[{"name":"Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA."},{"name":"Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, CA 94720, USA."}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"221","reference":[{"key":"e_1_3_2_2_2","doi-asserted-by":"publisher","DOI":"10.1038\/s41928-020-0461-5"},{"key":"e_1_3_2_3_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.jmmm.2020.166711"},{"key":"e_1_3_2_4_2","doi-asserted-by":"publisher","DOI":"10.1063\/5.0083897"},{"key":"e_1_3_2_5_2","doi-asserted-by":"crossref","unstructured":"K. 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