{"paper":{"title":"Femtosecond X-ray magnetic circular dichroism absorption spectroscopy at an X-ray free electron laser","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Alberto A. Lutman, Alex H. Reid, Ankush Mitra, Arata Tsukamoto, Daniel J. Higley, Edwin Yuan, Elke Arenholz, Emmanuelle Jal, Georgi L. Dakovski, Giacomo Coslovich, Heinz-Dieter Nuhn, Hendrik Ohldag, Hermann A. D\\\"urr, James P. MacArthur, Joachim St\\\"ohr, John Joseph, Konstantin Hirsch, Lo\\\"ic Le Guyader, Matthew Seaberg, Matthias C. Hoffmann, Padraic Shafer, Patrick W. Granitzka, Peter Denes, Philip Hart, Stefan Moeller, TianMin Liu, William F. Schlotter, Zhao Chen","submitted_at":"2015-11-23T19:21:09Z","abstract_excerpt":"X-ray magnetic circular dichroism spectroscopy using an X-ray free electron laser is demonstrated with spectra over the Fe L$_{3,2}$-edges. This new ultrafast time-resolved capability is then applied to a fluence-dependent study of all-optical magnetic switching dynamics of Fe and Gd magnetic sublattices in a GdFeCo thin film above its magnetization compensation temperature. At the magnetic switching fuence, we corroborate the existence of a transient ferromagnetic-like state. The timescales of the dynamics, however, are longer than previously observed below the magnetization compensation temp"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1511.07372","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}