Title :
Manipulation of the Excitation State of the Coupled Vortices in a Pair of Magnetic Disks
Author :
Sugimoto, Satoshi ; Fukuma, Y. ; Otani, Y.
Author_Institution :
Inst. for Solid State Phys., Univ. of Tokyo, Kashiwa, Japan
Abstract :
Coupled gyration modes of the magnetic vortices are studied in two separated disks. We have experimentally detected that all four modes are selectively excited mainly by the spin-transfer torque, depending on the combination of their polarities and chiralities. The evaluated dipolar coupling intensity shows a certain decrease from the rigid vortex model.
Keywords :
Permalloy; chirality; discs (structures); ferromagnetic materials; magnetisation; spin polarised transport; Ni81Fe19; chiralities; coupled gyration modes; coupled vortices; dipolar coupling intensity; excitation state; magnetic disk pair; magnetic vortices; magnetization; polarities; rigid vortex model; spin-transfer torque; Couplings; Magnetic cores; Magnetic domains; Magnetic resonance; Magnetic separation; Magnetostatics; Anisotropic magnetoresistance; magnetic domains; magnetic resonance; spin-polarized transport;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2011.2159367
