Magnetization of an isolated single dot fabricated from a single crystal FePt film was measured by detection of anomalous Hall effect. The dots with diameter ranging from 60 nm to 12 μm exhibited perfect rectangular magnetization loops. The activation energy was evaluated to be 4×10-19 J, equivalent to domain-wall energy times the square of the domain-wall thickness.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)