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By combining the element specificity of extreme ultraviolet high-harmonic probes with time-dependent density functional theory, we disentangle the competition between three ultrafast light-induced processes that occur in Co\n            <jats:sub>2<\/jats:sub>\n            MnGa: same-site Co-Co spin transfer, intersite Co-Mn spin transfer, and ultrafast spin flips mediated by spin-orbit coupling. By measuring the dynamic magnetic asymmetry across the entire M-edges of the two magnetic sublattices involved, we uncover the relative dominance of these processes at different probe energy regions and times during the laser pulse. Our combined approach enables a comprehensive microscopic interpretation of laser-induced magnetization dynamics on time scales shorter than 100 femtoseconds.\n          <\/jats:p>","DOI":"10.1126\/sciadv.adi1428","type":"journal-article","created":{"date-parts":[[2023,11,10]],"date-time":"2023-11-10T18:58:41Z","timestamp":1699642721000},"update-policy":"https:\/\/doi.org\/10.34133\/aaas_crossmark","source":"Crossref","is-referenced-by-count":30,"title":["Optically controlling the competition between spin flips and intersite spin transfer in a Heusler half-metal on sub\u2013100-fs time scales"],"prefix":"10.1126","volume":"9","author":[{"given":"Sin\u00e9ad A.","family":"Ryan","sequence":"first","affiliation":[{"name":"JILA, University of Colorado Boulder, 440 UCB, Boulder, CO 80309, USA."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Peter C.","family":"Johnsen","sequence":"additional","affiliation":[{"name":"JILA, University of Colorado Boulder, 440 UCB, Boulder, CO 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