Generation of local magnetic fields at megahertz rates for the study of domain wall propagation in magnetic nanowires

Bergman, Bastiaan; Moriya, Rai; Hayashi, Masamitsu; Thomas, Luc; Tyberg, Christy; Lu, Yu; Joseph, Eric; Rothwell, Mary-Beth; Hummel, John; Gallagher, William J.; Koopmans, Bert; Parkin, Stuart S. P.
December 2009
Applied Physics Letters;12/28/2009, Vol. 95 Issue 26, p262503
Academic Journal
We describe a technique for generating local magnetic fields at megahertz rates along magnetic nanowires. Local and global magnetic fields are generated from buried copper fine-pitch wires fabricated on 200 mm silicon wafers using standard complementary metal-oxide-semiconductor back-end process technology. In combination with pump-probe scanning Kerr microscopy, we measure the static and dynamic propagation fields of domain walls in permalloy nanowires.


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