F. Miletto Granozio⁷, J. A. Miwa⁴, R. Ernstorfer¹, T. Pincelli¹, T. Klimczuk^3,†, C. Bigi^5,‡, and F. Mazzola^7,§,∥

• ¹Institut für Physik und Astronomie, Technische Universität Berlin, Straße des 17 Juni 135, 10623 Berlin, Germany and Fritz Haber Institut der Max Planck Gesellshaft, Faradayweg 4–6, 14195 Berlin, Germany
• ²Department of Engineering Sciences, University of Agder, NO-4879 Grimstad, Norway
• ³Faculty of Applied Physics and Mathematics, Advanced Materials Centre, Gdansk University of Technology, Narutowicza 11/12, 80-233, Gdansk, Poland
• ⁴Department of Physics and Astronomy, Interdisciplinary Nanoscience Center, Aarhus University, 8000 Aarhus C, Denmark
• ⁵Synchrotron SOLEIL, L'Orme des Merisiers, Départementale 128, 91190 Saint-Aubin, France
• ⁶Department of Applied Physics, Stanford University, Stanford, California 94305-4090, USA
• ⁷CNR-SPIN, c/o Complesso di Monte S. Angelo, IT-80126 Napoli, Italy

• ^*These authors contributed equally to this work.
• ^†Contact author: tomasz.klimczuk@pg.edu.pl
• ^‡Contact author: chiara.bigi@synchrotron-soleil.fr
• ^§Contact author: federico.mazzola@unipd.it
• ^∥Present address: Department of Physics and Astronomy ‘Galileo Galilei,’ University of Padova, Padova, Italy.