Tunnel current induces instability in Co NPs

Magnetic instability induced by tunnel current in single Co nanoparticles.
F. T. Birk, W. Jiang, D. Davidovic
ArXiv 1107.2850 (2012)

A: SEM of a typical sample. The scale bar indicates 0.2μm. B: Sketch representing the sample fabrication process. C-E: Current versus voltage in samples 1-3 (top to bottom), at 60mK and 0T.