We have successfully fabricated single and paired 300 nm × 1.5 υm × 32 nm Ni80Fe20 bars on a microcantilever using focused ion beam milling. Magnetic interactions of these paired bars were studied by using magnetic force microscopy, microcantilever torque magnetometry and micromagnetic simulation. Our results clearly indicate that the magnetic switching behavior of the paired Ni80Fe20 bars is affected by magnetostatic interactions. The M-H hysteresis curves for a sample with 8 pairs of Ni80Fe20 bars consists of a series of stable switching states that are related to the domain wall motion in the bars.
Citation: Journal of Applied Physics
Pub Type: Journals
Domain structure, Fe alloys, Magnetization curves, Microcantilever, Torque magnetometry