Magnetic characterization and switching of Co nanorings in current-perpendicular-to-plane configuration

被引：29

作者：

Yang, T.

Hara, M.

Hirohata, A.

Kimura, T.

Otani, Y.

机构：

[1] RIKEN, Frontier Res Syst, Wako, Saitama 3510198, Japan

[2] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2278581, Japan

来源：

APPLIED PHYSICS LETTERS | 2007年 / 90卷 / 02期

关键词：

D O I：

10.1063/1.2431471

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The authors fabricated Co nanorings incorporated in the vertical pseudo-spin-valve nanopillar structures with deep submicron lateral sizes. It is shown that the current-perpendicular-to-plane giant magnetoresistance can be used to characterize a very small magnetic nanoring effectively. Both the onion state and the flux-closure vortex state are observed. The Co nanorings can be switched between the onion states as well as between onion and vortex states not only by the external field but also by the perpendicularly injected dc current.

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页数：3

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共 23 条

[1] Emission of spin waves by a magnetic multilayer traversed by a current [J].

Berger, L .

PHYSICAL REVIEW B, 1996, 54 (13) :9353-9358

[2] Current-driven reversal in annular vertical giant magnetoresistive devices [J].

Bussmann, K ;

Prinz, GA ;

Bass, R ;

Zhu, JG .

APPLIED PHYSICS LETTERS, 2001, 78 (14) :2029-2030

[3] Spin-dependent scattering in multilayered magnetic rings -: art. no. 137201 [J].

Castaño, FJ ;

Morecroft, D ;

Jung, W ;

Ross, CA .

PHYSICAL REVIEW LETTERS, 2005, 95 (13)

[4] Transmission electron microscopies of magnetic microstructures [J].

Chapman, JN ;

Scheinfein, MR .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1999, 200 (1-3) :729-740

[5] Room temperature magnetic quantum cellular automata [J].

Cowburn, RP ;

Welland, ME .

SCIENCE, 2000, 287 (5457) :1466-1468

[6] Micromagnetic study of switching in ring-shaped spin valve structures [J].

Guo, J ;

Jalil, MBA .

IEEE TRANSACTIONS ON MAGNETICS, 2004, 40 (04) :2122-2124

[7] Nanoscale ferromagnetic rings fabricated by electron-beam lithography [J].

Heyderman, LJ ;

David, C ;

Kläui, M ;

Vaz, CAF ;

Bland, JAC .

JOURNAL OF APPLIED PHYSICS, 2003, 93 (12) :10011-10013

[8] Effective reduction of critical current for current-induced magnetization switching by a Ru layer insertion in an exchange-biased spin valve [J].

Jiang, Y ;

Abe, S ;

Ochiai, T ;

Nozaki, T ;

Hirohata, A ;

Tezuka, N ;

Inomata, K .

PHYSICAL REVIEW LETTERS, 2004, 92 (16) :167204-1

[9] Current-driven magnetization reversal and spin-wave excitations in Co/Cu/Co pillars [J].

Katine, JA ;

Albert, FJ ;

Buhrman, RA ;

Myers, EB ;

Ralph, DC .

PHYSICAL REVIEW LETTERS, 2000, 84 (14) :3149-3152

[10] Direct observation of spin configurations and classification of switching processes in mesoscopic ferromagnetic rings -: art. no. 134426 [J].

Kläui, M ;

Vaz, CAF ;

Bland, JAC ;

Monchesky, TL ;

Unguris, J ;

Bauer, E ;

Cherifi, S ;

Heun, S ;

Locatelli, A ;

Heyderman, LJ ;

Cui, Z .

PHYSICAL REVIEW B, 2003, 68 (13)