Spin transfer in magnetic tunnel junctions with hot electrons

被引：30

作者：

Levy, Peter M.

Fert, Albert

机构：

[1] CNRS THALES, Unite Mixte Phys, Thales Res Ctr, F-91767 Palaiseau, France

[2] NYU, Dept Phys, New York, NY 10003 USA

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 97卷 / 09期

关键词：

D O I：

10.1103/PhysRevLett.97.097205

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Recent data on the bias dependence of the spin transfer effect in magnetic tunnel junctions have shown that torque remains intact at bias voltages for which the tunneling magnetoresistance has been strongly reduced. We show that the current induced excitations due to hot electrons, while reducing the magnetoresistance, enhance both the charge current and the spin transfer in magnetic tunnel junctions in such a manner that the ratio of the torque to the charge current does not significantly change.

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页数：4

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共 24 条

[1] Spin-polarized current switching of a Co thin film nanomagnet [J].

Albert, FJ ;

Katine, JA ;

Buhrman, RA ;

Ralph, DC .

APPLIED PHYSICS LETTERS, 2000, 77 (23) :3809-3811

[2]

[Anonymous], ELECT TRANSPORT MESO

[3] From giant magnetoresistance to current-induced switching by spin transfer [J].

Barnas, J ;

Fert, A ;

Gmitra, M ;

Weymann, I ;

Dugaev, VK .

PHYSICAL REVIEW B, 2005, 72 (02)

[4] Finite-element theory of transport in ferromagnet-normal metal systems [J].

Brataas, A ;

Nazarov, YV ;

Bauer, GEW .

PHYSICAL REVIEW LETTERS, 2000, 84 (11) :2481-2484

[5] Current-driven magnetization reversal in a ferromagnetic semiconductor (Ga,Mn)As/GaAs/(Ga,Mn)As tunnel junction [J].

Chiba, D ;

Sato, Y ;

Kita, T ;

Matsukura, F ;

Ohno, H .

PHYSICAL REVIEW LETTERS, 2004, 93 (21)

[6] Spin transfer experiments on (Ga,Mn)As/(In,Ga)As/(Ga,Mn)As tunnel junctions -: art. no. 035303 [J].

Elsen, M ;

Boulle, O ;

George, JM ;

Jaffrès, H ;

Mattana, R ;

Cros, V ;

Fert, A ;

Lemaitre, A ;

Giraud, R ;

Faini, G .

PHYSICAL REVIEW B, 2006, 73 (03)

[7] Spin torque, tunnel-current spin polarization, and magnetoresistance in MgO magnetic tunnel junctions [J].

Fuchs, G. D. ;

Katine, J. A. ;

Kiselev, S. I. ;

Mauri, D. ;

Wooley, K. S. ;

Ralph, D. C. ;

Buhrman, R. A. .

PHYSICAL REVIEW LETTERS, 2006, 96 (18)

[8] Adjustable spin torque in magnetic tunnel junctions with two fixed layers [J].

Fuchs, GD ;

Krivorotov, IN ;

Braganca, PM ;

Emley, NC ;

Garcia, AGF ;

Ralph, DC ;

Buhrman, RA .

APPLIED PHYSICS LETTERS, 2005, 86 (15) :1-3

[9] Spin-transfer effects in nanoscale magnetic tunnel junctions [J].

Fuchs, GD ;

Emley, NC ;

Krivorotov, IN ;

Braganca, PM ;

Ryan, EM ;

Kiselev, SI ;

Sankey, JC ;

Ralph, DC ;

Buhrman, RA ;

Katine, JA .

APPLIED PHYSICS LETTERS, 2004, 85 (07) :1205-1207

[10] Spin-polarized current induced switching in Co/Cu/Co pillars [J].

Grollier, J ;

Cros, V ;

Hamzic, A ;

George, JM ;

Jaffrès, H ;

Fert, A ;

Faini, G ;

Ben Youssef, J ;

Legall, H .

APPLIED PHYSICS LETTERS, 2001, 78 (23) :3663-3665