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DS: Fachverband Dünne Schichten
DS 11: Focus Session: Sensoric Micro and Nano-systems I
DS 11.4: Talk
Tuesday, April 1, 2014, 10:30–10:45, CHE 89
Magnetic Domains in Rolled-Up Ferromagnetic Single-Layer Nanomembranes and Magnetically Capped Tubular Architectures — •Robert Streubel1, Denys Makarov1, Peter Fischer2, Rudolf Schäfer3, and Oliver G. Schmidt1 — 1Institute for Integrative Nanosciences, IFW Dresden, 01069 Dresden, Germany — 2CXRO, LBNL, Berkeley CA 94720, USA — 3Institute for Metallic Materials, IFW Dresden, 01069 Dresden, Germany
Rolled-up magnetic nanomembranes have recently enabled novel sensoric devices and spin-wave filters. Their application potential relies on understanding the modification of magnetic configurations under external stimuli. Due to difficulties in visualizing magnetic domain patterns in these truly 3D structures, the magnetization configuration in cylindrical architectures is usually derived from integral measurements, such as magnetoresistance techniques. Here, we directly visualize magnetic domain patterns in magnetically capped tubes [1] and rolled-up single layer magnetic nanomembranes [2]. By Photoelectron emission and Kerr microscopies magnetic signals from the top part of the tube were recorded whereas magnetic soft X-ray microscopy allowed to probe internal parts of the tube. We demonstrate the possibility to tailor the magnetization orientation from longitudinal for positive magnetostrictive materials over spiral-like to azimuthal for negative ones [2]. These patterns cause distinct magnetoelectronic responses, which is relevant to know for sensoric applications.
[1] R. Streubel et al. Nano Lett. 12, 3961 (2012)
[2] R. Streubel et al., Adv. Mater. 10.1002/adma.201303003