Speaker
Description
Ferromagnetic nanotubes are promising candidates for high density magnetic storage technology,due to the possibility to define flux-closure remnant states and control their magnetization reversal processes via geometrical parameters such as length,inner and outer diameter.They form interesting nanoelements also in the field of magnonics, allowing for tailored shape-induced spin wave confinement.We report an experimental study of spin-wave excitation in individual Ni80Fe20 nanotubes with lengths in the range of 5 to12μm and outer diameters of about 200nm by means of Brillouin light-scattering(BLS) spectroscopy.A series of spin wave resonances was detected.We explored them both spatially and phase-resolved at several positions along the nanotube.Our results provide microscopic insight into tubular nanocavities for magnons.
This work was funded by DFG GR1640/5-2 in SPP 1538.