{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,16]],"date-time":"2026-09-16T01:23:24Z","timestamp":1789521804566,"version":"build-2803163510"},"reference-count":37,"publisher":"Wiley","license":[{"start":{"date-parts":[[2026,8,12]],"date-time":"2026-08-12T00:00:00Z","timestamp":1786492800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,8,12]],"date-time":"2026-08-12T00:00:00Z","timestamp":1786492800000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"funder":[{"DOI":"10.13039\/501100001659","name":"Deutsche Forschungsgemeinschaft","doi-asserted-by":"publisher","award":["278162697 \u2013 SFB 1242"],"award-info":[{"award-number":["278162697 \u2013 SFB 1242"]}],"id":[{"id":"10.13039\/501100001659","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001659","name":"Deutsche Forschungsgemeinschaft","doi-asserted-by":"publisher","award":["328545488 \u2013 SFB\u2010TRR 227"],"award-info":[{"award-number":["328545488 \u2013 SFB\u2010TRR 227"]}],"id":[{"id":"10.13039\/501100001659","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001659","name":"Deutsche Forschungsgemeinschaft","doi-asserted-by":"publisher","award":["425217212 \u2013 SFB 1432"],"award-info":[{"award-number":["425217212 \u2013 SFB 1432"]}],"id":[{"id":"10.13039\/501100001659","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000015","name":"U.S. Department of Energy","doi-asserted-by":"publisher","award":["DE\u2010AC02\u201005\u2010CH11231"],"award-info":[{"award-number":["DE\u2010AC02\u201005\u2010CH11231"]}],"id":[{"id":"10.13039\/100000015","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000015","name":"U.S. Department of Energy","doi-asserted-by":"publisher","award":["DE\u2010AC02\u201076SF00515"],"award-info":[{"award-number":["DE\u2010AC02\u201076SF00515"]}],"id":[{"id":"10.13039\/100000015","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["advanced.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Advanced Science"],"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>Nanoscale miniaturization has revolutionized the field of spintronics by enabling exponential growth in areal bit density. A similar leap is also expected in device speeds through successfully harnessing femtosecond magnetization dynamics. However, combining this with the miniaturization of realistic devices is challenging. To address this, we studied the effect of dimensional confinement on the femtosecond demagnetization of Fe. By gradually increasing the level of confinement while keeping excitation conditions constant, we found that Fe layers thinner than 10 nm exhibit enlarged demagnetization amplitudes, reaching a \u223c75% increase at 2 nm. By combining ultrafast experiments sensitive to the spins, the charge carriers, and the phonons, we establish that this finite\u2010size effect is magnetic in origin and is not phonon\u2010driven. With the support of ab initio calculations and atomistic spin dynamics simulations, we identify the enhancement effect as due to local weakening of spin order at the Fe's interface, which becomes significant upon increased confinement.<\/jats:p>","DOI":"10.1002\/advs.77058","type":"journal-article","created":{"date-parts":[[2026,8,12]],"date-time":"2026-08-12T14:29:42Z","timestamp":1786544982000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Nanoscale Confinement Enhances Ultrafast Demagnetization"],"prefix":"10.1002","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6371-5837","authenticated-orcid":false,"given":"Yoav William","family":"Windsor","sequence":"first","affiliation":[{"name":"Institut f\u00fcr Physik und Astronomie Technische Universit\u00e4t Berlin  Berlin Germany"},{"name":"Fritz Haber Institute of the Max Planck Society  Berlin 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