Fast domain wall dynamics in magnetic nanotubes: Suppression of Walker breakdown and Cherenkov-like spin wave emission
TL;DR: In this article, a micromagnetic study on domain wall (DW) propagation in ferromagnetic nanotubes was conducted and it was found that DWs in a tubular geometry are much more robust than ones in flat strips.
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Abstract: We report on a micromagnetic study on domain wall (DW) propagation in ferromagnetic nanotubes. It is found that DWs in a tubular geometry are much more robust than ones in flat strips. This is explained by topological considerations. Our simulations show that the Walker breakdown of the DW can be completely suppressed. Constant DW velocities above 1000 m/s are achieved by small fields. A different velocity barrier of the DW propagation is encountered, which significantly reduces the DW mobility. This effect occurs as the DW reaches the phase velocity of spin waves (SWs), thereby triggering a Cherenkov-like emission of SWs.
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Citations
Change in the magnetic configurations of tubular nanostructures by tuning dipolar interactions
TL;DR: Comparison of the energy of the states obtained by simulation with those of simpler theoretical structures that interpolate continuously between them, reveals a high degree of metastability of the helical structures that might be relevant for their reversal modes.
Anisotropic magnetoresistance of individual CoFeB and Ni nanotubes with values of up to 1.4% at room temperature
Daniel Rüffer,M. R. Slot,Rupert Huber,Thomas Schwarze,F. Heimbach,Gözde Tütüncüoglu,Federico Matteini,Eleonora Russo-Averchi,András Kovács,Rafal E. Dunin-Borkowski,Reza R. Zamani,Joan Ramon Morante,Jordi Arbiol,Jordi Arbiol,Anna Fontcuberta i Morral,Dirk Grundler,Dirk Grundler +16 more
TL;DR: In this article, magnetotransport experiments on individual 10 to 20 μm long Ni and CoFeB NTs with outer diameters ranging from 160 to 390 nm and film thicknesses of 20 to 40 nm were conducted.
Plasma-enhanced atomic layer deposition of nickel nanotubes with low resistivity and coherent magnetization dynamics for 3D spintronics
Maria Carmen Giordano,Korbinian Baumgaertl,S. Escobar Steinvall,M Vuichard,A. Fontcuberta i Morral,Dirk Grundler +5 more
TL;DR: In this article, a plasma-enhanced atomic layer deposition (ALD) was used to prepare conformal nickel thin films and nanotubes using nickelocene as a precursor, water as the oxidant agent, and an in-cycle plasmaenhanced reduction step with hydrogen.
Imaging the fine structure of a magnetic domain wall in a Ni nanocylinder.
Nicolas Biziere,Christophe Gatel,Rémy Lassalle-Balier,M.-C. Clochard,Jean-Eric Wegrowe,Etienne Snoeck +5 more
TL;DR: The magnetic transition from a hybrid magnetic state with both vortex and transverse DW in 85 nm diameter Ni nanocylinders to a pure transverse wall in thinner nanowires is demonstrated.
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