Abstract
The magnetic properties of deep submicron circular nanomagnets fabricated by high-resolution electron beam lithography from Supermalloy have been studied as a function of both diameter (500–55 nm) and thickness (6–15 nm). A high sensitivity magneto-optical method has been used to measure the hysteresis loops of these nanomagnets. An experimental phase diagram in diameter and thickness has thus been produced which identifies a vortex phase and a single-domain phase. The two phases agree well with micromagnetic theory.
- Received 15 January 1999
DOI:https://doi.org/10.1103/PhysRevLett.83.1042
©1999 American Physical Society