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The orbital component of magnetization dynamics, e.g., excited by ferromagnetic resonance (FMR), may generate “orbitronic” effects in nanomagnetic devices. Yet, distinguishing orbital dynamics from spin dynamics remains a challenge. Here, we employ x-ray magnetic circular dichroism (XMCD) to quantify the ratio between the orbital and spin components of FMR-induced dynamics in a Ni80Fe20 film. By applying the XMCD sum rules at the Ni L3,2 edges, we obtain an orbital-to-spin ratio of 0.108 ± 0.005 for the dynamic magnetization. This value is consistent with 0.102 ± 0.008 for the static magnetization, probed with the same x-ray beam configuration as the dynamic XMCD experiment. The demonstrated method presents a possible path to disentangle orbitronic effects from their spintronic counterparts in magnetic media.
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Saha, S; Knut, R; Liu, H; Karaiskaj, Denis; Arena, Dario (, SPIE)Wegrowe, Jean-Eric; Razeghi, Manijeh; Friedman, Joseph S. (Ed.)
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Chanda, Amit; Rani, Deepika; DeTellem, Derick; Alzahrani, Noha; Arena, Dario A.; Witanachchi, Sarath; Chatterjee, Ratnamala; Phan, Manh-Huong; Srikanth, Hariharan (, ACS Applied Materials & Interfaces)
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Taylor, Chloe S.; Savadkoohi, Marzieh; Tyagi, Pawan; Shoup, Jenae E.; Arena, Dario A.; Borchers, Julie A.; Eckert, James; Gopman, Daniel B. (, ACS Applied Nano Materials)
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Liu, Hengzhou; Trinh, M Tuan; Clements, Eleanor M.; Sapkota, Deepak; Li, Ling; Romestan, Zachary; Bhat, Soumya; Mapara, Varun; Barua, Arup; Carrera, Samuel Langelund; et al (, Physical Review B)
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Shaw, Justin M.; Knut, Ronny; Armstrong, Abigail; Bhandary, Sumanta; Kvashnin, Yaroslav; Thonig, Danny; Delczeg-Czirjak, Erna K.; Karis, Olof; Silva, T. J.; Weschke, Eugen; et al (, Physical Review Letters)
