Berlin 2018 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 92: Focus Session: Spinorbitronics - From Efficient Charge/Spin Conversion Based on Spin-Orbit Coupling to Chiral Magnetic Skyrmions II (joint session MA/TT)

TT 92.5: Vortrag

Donnerstag, 15. März 2018, 16:30–16:45, H 1012

Large perpendicular magnetic anisotropy and Dzyaloshinskii Moriya chiral interaction at room temperature in epitaxial graphene-based structures — Fernando Ajejas¹, Adrian Gudin¹, Ruben Guerrero¹, Leticia De Melo Costa¹, Jose Manuel Diez¹, Pablo Olleros¹, Alberto Anadon¹, Maria Varela², Manuel Valvidares³, Pierluigi Gargiani³, Jan Vogel⁴, Stefania Pizzini⁴, Julio Camarero¹, Rodolfo Miranda¹, and •Paolo Perna¹ — ¹IMDEA Nanociencia, Madrid, Spain — ²ALBA SYNCHROTRON, Barcelona, Spain — ³Universidad Complutense de Madrid, Madrid, Spain — ⁴CNRS Institut Néel, Grenoble, France

A major challenge for future spintronics is to develop suitable spin transport channels with superior properties as long spin lifetime and propagation length. Graphene can meet these requirements, even at room temperature. On the other side, the use of fast motion of Néel-type chiral domain walls (and magnetic skyrmions) can satisfy the demands for high-density data storage, low power consumption and high processing speed. Here, by engineering the epitaxial growth of gr/Co/Pt(111) stacks on (111)-oriented oxide crystals, we achieve an enhanced perpendicular magnetic anisotropy (PMA), with Co thickness up to 4 nm, and left-handed Néel-type chiral domain walls (DWs) stabilized by a strong effective Dzyaloshinskii Moriya interaction (DMI).