Premium
Magnetization Dynamics of an Individual Single‐Crystalline Fe‐Filled Carbon Nanotube
Author(s) -
Lenz Kilian,
Narkowicz Ryszard,
Wagner Kai,
Reiche Christopher F.,
Körner Julia,
Schneider Tobias,
Kákay Attila,
Schultheiss Helmut,
Weissker Uhland,
Wolf Daniel,
Suter Dieter,
Büchner Bernd,
Fassbender Jürgen,
Mühl Thomas,
Lindner Jürgen
Publication year - 2019
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201904315
Subject(s) - ferromagnetic resonance , materials science , condensed matter physics , magnetization , carbon nanotube , nanowire , magnetization dynamics , magnetometer , brillouin zone , ferromagnetism , spin wave , chemical vapor deposition , resonance (particle physics) , brillouin and langevin functions , scattering , nanotechnology , optics , magnetic field , physics , quantum mechanics , particle physics
The magnetization dynamics of individual Fe‐filled multiwall carbon‐nanotubes (FeCNT), grown by chemical vapor deposition, are investigated by microresonator ferromagnetic resonance (FMR) and Brillouin light scattering (BLS) microscopy and corroborated by micromagnetic simulations. Currently, only static magnetometry measurements are available. They suggest that the FeCNTs consist of a single‐crystalline Fe nanowire throughout the length. The number and structure of the FMR lines and the abrupt decay of the spin‐wave transport seen in BLS indicate, however, that the Fe filling is not a single straight piece along the length. Therefore, a stepwise cutting procedure is applied in order to investigate the evolution of the ferromagnetic resonance lines as a function of the nanowire length. The results show that the FeCNT is indeed not homogeneous along the full length but is built from 300 to 400 nm long single‐crystalline segments. These segments consist of magnetically high quality Fe nanowires with almost the bulk values of Fe and with a similar small damping in relation to thin films, promoting FeCNTs as appealing candidates for spin‐wave transport in magnonic applications.