Regensburg 2019 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 3: Focus Session: Novel 3D magnetic spin textures
MA 3.6: Vortrag
Montag, 1. April 2019, 12:00–12:15, H38
Magnetic ground states of perfect Py nanotubes and rings — •Elisabeth Josten1, András Kovács1, Felix Oertel2, Artur Glavic3, Thomas Jansen1, Trevor P. Almeida4, Attila Kákay5, Teresa Wessels1, Manuel Langer3, Jörg Raabe3, Daniel E. Bürgler1, Katja Höflich2, and Rafal E. Dunin-Borkowski1 — 1Forschungszentrum Jülich, Jülich, Germany — 2Helmholtz-Zentrum Berlin for Materials and Energy, Berlin, Germany — 3Paul Scherrer Institut, Villigen PSI, Switzerland. — 4University of Glasgow, Glasgow, United Kingdom — 5Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany
Magnetic nanotubes (MNTs) have unique static and dynamic magnetic properties due to their size, aspect ratio, curvature and hollow structure. It is important to optimize the magnetic ground states of such 3D curved nano-objects for their successful implementation in novel devices. Recently, the synthesis of MNTs with perfectly circular cross-sections was achieved. The MNTs were fabricated by coating a carbon core template with a magnetron-sputtered permalloy (Py) shell. Here, we focus on the characterization of magnetic states in individual Py nanotubes and their cross-sections, which take the form of magnetic rings (MRs). The MRs were prepared by slicing individual MNTs using focused ion beam milling. For the investigation, we make use of scanning transmission X-ray microscopy and off-axis electron holography performed in a transmission electron microscope. The MRs are found to support novel magnetic states such as double vortices.