Current-induced transverse spin-wave instability in thin ferromagnets: Beyond linear stability analysis

被引：17

作者：

Adam, S ^{[1
]}

Polianski, ML ^{[1
]}

Brouwer, PW ^{[1
]}

机构：

[1] Cornell Univ, Atom & Solid State Phys Lab, Ithaca, NY 14853 USA

来源：

PHYSICAL REVIEW B | 2006年 / 73卷 / 02期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevB.73.024425

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A sufficiently large unpolarized current can cause a spin-wave instability in thin nanomagnets with asymmetric contacts. The dynamics beyond the instability is understood in the perturbative regime of small spin-wave amplitudes, as well as by numerically solving a discretized model. In the absence of an applied magnetic field, our numerical simulations reveal a hierarchy of instabilities, leading to chaotic magnetization dynamics for the largest current densities we consider.

引用

页数：13

共 41 条

[21] Bipolar high-field excitations in Co/Cu/Co nanopillars -: art. no. 140403 [J].

Özyilmaz, B ;

Kent, AD ;

Rooks, MJ ;

Sun, JZ .

PHYSICAL REVIEW B, 2005, 71 (14)

[22] Current-induced excitations in single cobalt ferromagnetic layer nanopillars -: art. no. 176604 [J].

Özyilmaz, B ;

Kent, AD ;

Sun, JZ ;

Rooks, MJ ;

Koch, RH .

PHYSICAL REVIEW LETTERS, 2004, 93 (17) :176604-1

[23] Current-induced transverse spin-wave instability in a thin nanomagnet [J].

Polianski, ML ;

Brouwer, PW .

PHYSICAL REVIEW LETTERS, 2004, 92 (02) :4

[24] Direct-current induced dynamics in Co90Fe10/Ni80Fe20 point contacts -: art. no. 027201 [J].

Rippard, WH ;

Pufall, MR ;

Kaka, S ;

Russek, SE ;

Silva, TJ .

PHYSICAL REVIEW LETTERS, 2004, 92 (02) :4

[25] Approximate theory of microwave generation in a current-driven magnetic nanocontact magnetized in an arbitrary direction [J].

Slavin, AN ;

Kabos, P .

IEEE TRANSACTIONS ON MAGNETICS, 2005, 41 (04) :1264-1273

[26] Current-driven excitation of magnetic multilayers [J].

Slonczewski, JC .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1996, 159 (1-2) :L1-L7

[27] Phenomenological theory of current-induced magnetization precession [J].

Stiles, MD ;

Xiao, J ;

Zangwill, A .

PHYSICAL REVIEW B, 2004, 69 (05)

[28] Anatomy of spin-transfer torque [J].

Stiles, MD ;

Zangwill, A .

PHYSICAL REVIEW B, 2002, 66 (01) :144071-1440714

[29] Spin-dependent interface transmission and reflection in magnetic multilayers [J].

Stiles, MD .

JOURNAL OF APPLIED PHYSICS, 1996, 79 (08) :5805-5810

[30] Spin-current interaction with a monodomain magnetic body: A model study [J].

Sun, JZ .

PHYSICAL REVIEW B, 2000, 62 (01) :570-578

← 1 2 3 4 5 →