Symmetry-dependent ultrafast manipulation of nanoscale magnetic domains

Nanna Zhou Hagström, Rahul Jangid, Meera Madhavi, Diego Turenne, Jeffrey A. Brock, Erik S. Lamb, Boyan Stoychev, Justine Schlappa, Natalia Gerasimova, Benjamin Van Kuiken, Rafael Gort, Laurent Mercadier, Loïc Le Guyader, Andrey Samartsev, Andreas Scherz, Giuseppe Mercurio, Hermann A. Dürr, Alexander H. Reid, Monika Arora, Hans T. NembachJustin M. Shaw, Emmanuelle Jal, Eric E. Fullerton, Mark W. Keller, Roopali Kukreja, Stefano Bonetti, Thomas J. Silva, Ezio Iacocca*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish
Article number224424
JournalPhysical Review B
Volume106
Issue number22
Early online date23 Dec 2022
DOIs
Publication statusPublished - Dec 2022

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