Direct investigation of superparamagnetism in Co nanoparticle films |
| |
Authors: | Woods S I Kirtley J R Sun S Koch R H |
| |
Institution: | IBM T. J. Watson Research Center, Yorktown Heights, New York 10598, USA. |
| |
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. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|