Magnetization noise in magnetoelectronic nanostructures

被引：83

作者：

Foros, J ^{[1
]}

Brataas, A

Tserkovnyak, Y

Bauer, GEW

机构：

[1] Norwegian Univ Sci & Technol, Dept Phys, N-7491 Trondheim, Norway

[2] Harvard Univ, Lyman Lab Phys, Cambridge, MA 02138 USA

[3] Delft Univ Technol, Kavli Inst Nanosci, NL-2628 CJ Delft, Netherlands

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 95卷 / 01期

关键词：

D O I：

10.1103/PhysRevLett.95.016601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

By scattering theory we show that spin current noise in normal electric conductors in contact with nanoscale ferromagnets increases the magnetization noise by means of a fluctuating spin-transfer torque. Johnson-Nyquist noise in the spin current is related to the increased Gilbert damping due to spin pumping, in accordance with the fluctuation-dissipation theorem. Spin current shot noise in the presence of an applied bias is the dominant contribution to the magnetization noise at low temperatures.

引用

页数：4

共 24 条

[1] Spin-flip noise in a multiterminal spin valve [J].

Belzig, W ;

Zareyan, M .

PHYSICAL REVIEW B, 2004, 69 (14) :140407-1

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

Berger, L .

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

[3] Shot noise in mesoscopic conductors [J].

Blanter, YM ;

Büttiker, M .

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 2000, 336 (1-2) :1-166

[4] Spin-transport in multi-terminal normal metal-ferromagnet systems with non-collinear magnetizations [J].

Brataas, A ;

Nazarov, YV ;

Bauer, GEW .

EUROPEAN PHYSICAL JOURNAL B, 2001, 22 (01) :99-110

[5] 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

[6] THERMAL FLUCTUATIONS OF A SINGLE-DOMAIN PARTICLE [J].

BROWN, WF .

PHYSICAL REVIEW, 1963, 130 (05) :1677-+

[7] Current-induced magnetization dynamics in current perpendicular to the plane spin valves [J].

Covington, M ;

AlHajDarwish, M ;

Ding, Y ;

Gokemeijer, NJ ;

Seigler, MA .

PHYSICAL REVIEW B, 2004, 69 (18) :184406-1

[8] 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

[9] Microwave oscillations of a nanomagnet driven by a spin-polarized current [J].

Kiselev, SI ;

Sankey, JC ;

Krivorotov, IN ;

Emley, NC ;

Schoelkopf, RJ ;

Buhrman, RA ;

Ralph, DC .

NATURE, 2003, 425 (6956) :380-383

[10] Thermally assisted magnetization reversal in submicron-sized magnetic thin films [J].

Koch, RH ;

Grinstein, G ;

Keefe, GA ;

Lu, Y ;

Trouilloud, PL ;

Gallagher, WJ ;

Parkin, SSP .

PHYSICAL REVIEW LETTERS, 2000, 84 (23) :5419-5422

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