Abstract
Cantilever magnetometry with moment resolution better than was used to study individual nanomagnets. By using the fluctuation-dissipation theorem to interpret measurements of field-induced cantilever damping, the low frequency spectral density of magnetic fluctuations could be determined with resolution better than . Cobalt nanowires exhibited significant magnetic dissipation and the associated magnetic fluctuations were found to have frequency dependence. In individual submicron rare-earth alloy magnets, the dissipation/fluctuation was very small and not distinguishable from that of a bare silicon cantilever.
- Received 12 July 2000
DOI:https://doi.org/10.1103/PhysRevLett.86.2874
©2001 American Physical Society