Anti-vortex state in cross-like nanomagnets

Authors :: Mironov, V. L.
Ermolaeva, O. L.
Gusev, S. A.
Klimov, A. Yu.
Rogov, V. V.
Gribkov, B. A.
Fraerman, A. A.
Udalov, O. G.
Marsh, R.
Checkley, C.
Petrashov, R. Shaikhaidarov V. T.
Publication Year :: 2009
Abstract: We report on results of computer micromodelling of anti-vortex states in asymmetrical cross-like ferromagnetic nanostructures and their practical realization. The arrays of cobalt crosses with 1 mkm branches, 100 nm widths of the branches and 40 nm thicknesses were fabricated using e-beam lithography and ion etching. Each branch of the cross was tapered at one end and bulbous at the other. The stable formation of anti-vortex magnetic states in these nanostructures during magnetization reversal was demonstrated experimentally using magnetic force microscopy.<br />Comment: 19 pages, 9 figures