Dresden 2017 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 3: Magnetic Textures: Statics and experimental imaging
MA 3.12: Vortrag
Montag, 20. März 2017, 12:30–12:45, HSZ 101
Influence of the surface reconstruction on magnetic interactions in an Fe double-layer on Ir(111) — •M. Dupé1, S. Heinze2, and B. Dupé1,2 — 1Institut für Physik, Johannes Gutenberg Universität, Mainz — 2Institut für Theoretische Physik und Astrophysik, Cristian-Albrechts Universität, Kiel
Skyrmions are localized and topologically stabilized non-collinear spin structures. Isolated skyrmions offer attractive perspectives for future spintronic applications because they can be manipulated at lower current densities than domain walls [1]. Isolated skyrmions have been stabilized and manipulated in the Pd/Fe ultra-thin film on Ir(111) [2]. An effective Hamiltonian parameterized via density functional theory (DFT) has predicted a Curie temperature (Tc) of 100K [3]. Recently, we have shown that Tc could be increased in a multilayer geometry [4]. Here we report on a DFT study of the magnetic interactions of an Fe double-layer on Ir(111) [5]. We determine the magnetic interactions depending on the surface reconstruction and show that the Fe double-layer can be stabilized by the reconstruction from a (111) to a (110) surface. [1] A. Fert, et al Nature Nano. 8, 152 (2013). [2] N. Romming, et al 341, 636 Science (2013). [3] L. Rózsa, et al Phys. Rev. B 93, 024417 (2016). [4] B. Dupé, et al Nature Comm. 7, 11779 (2016). [5] P.-J. Hsu, et al Phys. Rev. Lett. 116, 017201 (2016).