Relative Vortex State Control in a Co/Cu/Co Pseudo-Spin-Valve Ring

Relative Vortex State Control in a Co/Cu/Co Pseudo-Spin-Valve Ring

The magnetization reversal process of a Co/Cu/Co pseudo-spin-valve ring structure has been investigated by magneto-resistance measurements and micromagnetic simulations. Major-loop measurement reveals four distinct magnetic configurations between the top and bottom Co rings. We conducted minor-loop...

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Veröffentlicht in:Japanese Journal of Applied Physics 2012-04, Vol.51 (4), p.04DM04-04DM04-3
Hauptverfasser: Demiray, Ahmet S, Miyawaki, Tetsuya, Watanabe, Yusuke, Kohda, Makoto, Saito, Kesami, Mitani, Seiji, Takanashi, Koki, Nitta, Junsaku
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container_end_page 04DM04-3
container_issue 4
container_start_page 04DM04
container_title Japanese Journal of Applied Physics
container_volume 51
creator Demiray, Ahmet S
Miyawaki, Tetsuya
Watanabe, Yusuke
Kohda, Makoto
Saito, Kesami
Mitani, Seiji
Takanashi, Koki
Nitta, Junsaku
description The magnetization reversal process of a Co/Cu/Co pseudo-spin-valve ring structure has been investigated by magneto-resistance measurements and micromagnetic simulations. Major-loop measurement reveals four distinct magnetic configurations between the top and bottom Co rings. We conducted minor-loop measurements with a fixed vortex configuration in the bottom Co ring while the magnetic state of the top Co ring was changed between the onion and vortex states. It was found that the parallel vortex between the top and bottom rings shows a stable magnetization state when the top Co ring is not fully saturated in the onion state, in which the local vortex remains at the ring edge. Micromagnetic simulations also confirm that the local vortex remaining in the top ring contributes to the control of the magnetic parallel vortex state.
doi_str_mv 10.1143/JJAP.51.04DM04
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title Relative Vortex State Control in a Co/Cu/Co Pseudo-Spin-Valve Ring
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