Direct investigation of superparamagnetism in Co nanoparticle films.
Phys Rev Lett
; 87(13): 137205, 2001 Sep 24.
Article
in En
| MEDLINE
| ID: mdl-11580625
ABSTRACT
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.
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Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Phys Rev Lett
Year:
2001
Document type:
Article
Affiliation country: