Journal
IEEE TRANSACTIONS ON MAGNETICS
Volume 46, Issue 6, Pages 1906-1909Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TMAG.2009.2038799
Keywords
Co/Au/Ni80Fe20; elongated nanorings; exchange coupling; MOKE
Funding
- Singapore-MIT Alliance
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [849278] Funding Source: National Science Foundation
Ask authors/readers for more resources
We describe the magnetization reversal processes in multilayer elongated Ni80Fe20(10 nm)/Au(t = 0 to 20 nm)/Co(20 nm)/Si(001) nanorings. For a field applied in-plane along the long axis, the hysteresis loops display a two-step switching for both t = 0 and 2 nm, and a three-step switching for t = 10 nm and 20 nm. Onion-to-vortex and vortex-to-reverse onion state transitions occur for a thin Au spacer due to strong exchange coupling between the layers. For a thick Au spacer layer, the Ni80Fe20 layer switches first, then a two-step reversal of the Co, correlated with domain motion in the Ni80Fe20, occurs without the formation of vortex states as a result of magnetostatic interactions. There is a good agreement between the experimental results and micromagnetic simulations.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available