F. Lombardi, F. Tafuri, et al.
Physical Review Letters
A direct probe of superparamagnetism was used to determine the complete anisotropy energy distribution of Co nanoparticle films. The films were composed of self-assembled lattices of uniform Co nanoparticles of 3 or 5 nm in diameter, and a variable temperature scanning-SQUID microscope was used to measure temperature-induced spontaneous magnetic noise in the samples. Accurate measurements of anisotropy energy distributions of small volume samples will be critical to magnetic optimization of nanoparticle devices and media. © 2001 American Physical Society.
F. Lombardi, F. Tafuri, et al.
Physical Review Letters
Guanxiong Li, Shan X. Wang, et al.
IEEE Transactions on Magnetics
K. Hasselbach, J.R. Kirtley, et al.
Physica B: Physics of Condensed Matter
D.J. DiMaria, J.R. Kirtley, et al.
Journal of Applied Physics