Berlin 2018 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 43: Magnetic textures I
MA 43.3: Vortrag
Donnerstag, 15. März 2018, 10:00–10:15, EB 407
Influence of hydrogen on noncollinear magnetic order in ultrathin Fe films on Ir(111) — •Levente Rózsa1, Pin-Jui Hsu1,2, Aurore Finco1, Lorenz Schmidt1, Krisztián Palotás3,4, Elena Vedmedenko1, László Udvardi5, László Szunyogh5, André Kubetzka1, Kirsten von Bergmann1, and Roland Wiesendanger1 — 1University of Hamburg, Hamburg, Germany — 2National Tsing Hua University, Hsinchu, Taiwan, R.O.C. — 3Institute of Physics, Slovak Academy of Sciences, Bratislava, Slovakia — 4University of Szeged, Szeged, Hungary — 5Budapest University of Technology and Economics, Budapest, Hungary
Magnetic skyrmions have lately attracted significant research attention due to their possible applications in data storage and logic devices[1]. In ultrathin films and multilayers, most of the efforts so far have concentrated on tuning the balance between interactions preferring collinear and noncollinear ordering by the appropriate choice of magnetic materials and heavy metals with high spin-orbit coupling[2]. Based on ab initio calculations, here we discuss how the addition of hydrogen to an Fe double-layer on Ir(111) influences the magnetic interactions through modifying the hybridization between the ultrathin magnetic film and the heavy metal substrate[3]. This effect leads to the stabilization of the magnetic skyrmion lattice in the presence of external magnetic fields, also demonstrated in spin-polarized scanning tunneling microscopy measurements performed on the system. [1] A. Fert et al., Nat. Nanotechnol. 8, 152 (2013). [2] B. Dupé et al., Nat. Commun. 7, 11779 (2016). [3] P.-J. Hsu et al., arXiv:1711.06784 (2017).