Thermal activation effect on spin transfer switching in magnetic tunnel junctions

被引：41

作者：

Higo, Y ^{[1
]}

Yamane, K ^{[1
]}

Ohba, K ^{[1
]}

Narisawa, H ^{[1
]}

Bessho, K ^{[1
]}

Hosomi, M ^{[1
]}

Kano, H ^{[1
]}

机构：

[1] Sony Corp, Informat Technol Labs, Solid State Memories Res Lab, Tagajo, Miyagi, Japan

来源：

APPLIED PHYSICS LETTERS | 2005年 / 87卷 / 08期

关键词：

D O I：

10.1063/1.2011795

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A calculation of the intrinsic spin transfer switching current I-c0 is realized in the magnetic tunnel junctions (MTJs). I-c0 is determined by the distribution of I-c in repeated measurements, assuming the linear decrease of the thermal stability by increasing the spin-polarized current. The spin transfer torque is found to be proportional to eta(I)I with the applied current I and I-dependent spin polarization eta(I). Even in case that I is limited less than I-c due to the tunnel barrier breakdown, I-c0 is calculated with an assisting external magnetic field and making better use of the magnetic phase diagram. In our MTJs, the average intrinsic switching current density was 6.4 MA/cm(2). (c) 2005 American Institute of Physics.

引用

页数：3

共 7 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] 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

[3] Observation of spin-transfer switching in deep submicron-sized and low-resistance magnetic tunnel junctions [J].

Huai, YM ;

Albert, F ;

Nguyen, P ;

Pakala, M ;

Valet, T .

APPLIED PHYSICS LETTERS, 2004, 84 (16) :3118-3120

[4] Time-resolved reversal of spin-transfer switching in a nanomagnet [J].

Koch, RH ;

Katine, JA ;

Sun, JZ .

PHYSICAL REVIEW LETTERS, 2004, 92 (08)

[5] Thermally activated magnetic reversal induced by a spin-polarized current [J].

Myers, EB ;

Albert, FJ ;

Sankey, JC ;

Bonet, E ;

Buhrman, RA ;

Ralph, DC .

PHYSICAL REVIEW LETTERS, 2002, 89 (19)

[6]

Slonczewski J. C. C., 1996, J MAGN MAGN MATER, V159, DOI DOI 10.1016/0304-8853(96)00062-5

[7] Current-induced effective magnetic fields in Co/Cu/Co nanopillars -: art. no. 184438 [J].

Zimmler, MA ;

Özyilmaz, B ;

Chen, W ;

Kent, AD ;

Sun, JZ ;

Rooks, MJ ;

Koch, RH .

PHYSICAL REVIEW B, 2004, 70 (18) :1-6

← 1 →