Symmetry-dependent ultrafast manipulation of nanoscale magnetic domains

Zhou Hagström, Nanna, Jangid, Rahul, Madhavi, Meera, Turenne, Diego, Brock, Jeffrey A., Lamb, Erik S., Stoychev, Boyan, Schlappa, Justine, Gerasimova, Natalia, Van Kuiken, Benjamin, Gort, Rafael, Mercadier, Laurent, Le Guyader, Loïc, Samartsev, Andrey, Scherz, Andreas, Mercurio, Giuseppe, Dürr, Hermann A., Reid, Alexander H., Arora, Monika, Nembach, Hans T., Shaw, Justin M., Jal, Emmanuelle, Fullerton, Eric E., Keller, Mark W., Kukreja, Roopali, Bonetti, Stefano, Silva, Thomas J. and Iacocca, Ezio (2022) Symmetry-dependent ultrafast manipulation of nanoscale magnetic domains. Physical Review B, 106 (22). p. 224424. ISSN 2469-9950

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Femtosecond optical pumping of magnetic materials has been used to achieve ultrafast switching and recently to nucleate symmetry-broken magnetic states. However, when the magnetic order parameter already presents a broken-symmetry state, such as a domain pattern, the dynamics are poorly understood and consensus remains elusive. Here, we resolve the controversies in the literature by studying the ultrafast response of magnetic domain patterns with varying degrees of translation symmetry with ultrafast x-ray resonant scattering. A data analysis technique is introduced to disentangle the isotropic and anisotropic components of the x-ray scattering. We find that the scattered intensity exhibits a radial shift restricted to the isotropic component, indicating that the far-from-equilibrium magnetization dynamics are intrinsically related to the spatial features of the domain pattern. Our results suggest alternative pathways for the spatiotemporal manipulation of magnetism via far-from-equilibrium dynamics and by carefully tuning the ground-state magnetic textures.

Item Type: Article
Uncontrolled Keywords: Funding Information: The authors acknowledge the European XFEL in Schenefeld, Germany, for provision of X-ray Free-Electron Laser beamtime at Scientific Instrument SCS, and we thank the instrument group and facility staff for their assistance. The authors thank Andrea Castoldi (DSSC consortium) for contributing to the generation of DSSC gain files, and Carsten Deiter for the confocal microscopy images. R.J., M.M., and R.K. acknowledge support from AFOSR Grant No. FA9550-19-1-0019. D.T. and H.A.D. acknowledge support from the Swedish Research Council (VR), A.H.R. acknowledges support from the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Contract No. DE-AC02-76SF00515. N.Z.H. and S.B. acknowledge support from the European Research Council, Starting Grant No. 715452 MAGNETIC-SPEED-LIMIT. E.I. acknowledges the College of Letters, Arts and Sciences at UCCS for start-up support.
Subjects: F300 Physics
H600 Electronic and Electrical Engineering
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Rachel Branson
Date Deposited: 11 Jan 2023 13:57
Last Modified: 11 Jan 2023 14:00

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