Magnetization switching and microwave oscillations in nanomagnets driven by spin-polarized currents

被引：171
作者：
Bertotti, G
Serpico, C
Mayergoyz, ID
Magni, A
d'Aquino, M
Bonin, R
机构：
[1] Ist Elettrotecnico Nazl Galileo Ferraris, I-10135 Turin, Italy
[2] Univ Naples Federico II, Dipartimento Ingn Elettr, I-80125 Naples, Italy
[3] Univ Maryland, Dept Elect & Comp Engn, College Pk, MD 20742 USA
[4] Politecn Torino, Dipartimento Fis, I-10129 Turin, Italy
来源：
PHYSICAL REVIEW LETTERS | 2005年 / 94卷 / 12期
关键词：
D O I：
10.1103/PhysRevLett.94.127206
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
A novel theoretical approach to magnetization dynamics driven by spin-polarized currents is presented. Complete stability diagrams are obtained for the case where spin torques and external magnetic fields are simultaneously present. Quantitative predictions are made for the critical currents and fields inducing magnetization switching, for the amplitude and frequency of magnetization self-oscillations, and for the conditions leading to hysteretic transitions between self-oscillations and stationary states.
引用
收藏
页数：4
相关论文
共 22 条
[1]   Current-induced magnetization switching in small domains of different anisotropies [J].
Bazaliy, YB ;
Jones, BA ;
Zhang, SC .
PHYSICAL REVIEW B, 2004, 69 (09)
[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]   Analytical solutions of Landau-Lifshitz equation for precessional dynamics [J].
Bertotti, G ;
Mayergoyz, ID ;
Serpico, C .
PHYSICA B-CONDENSED MATTER, 2004, 343 (1-4) :325-330
[4]   Field dependence of magnetization reversal by spin transfer -: art. no. 174402 [J].
Grollier, J ;
Cros, V ;
Jaffrès, H ;
Hamzic, A ;
George, JM ;
Faini, G ;
Ben Youssef, J ;
Le Gall, H ;
Fert, A .
PHYSICAL REVIEW B, 2003, 67 (17)
[5]   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
[6]  
Gurevich A. G., 1996, MAGNETIZATION OSCILL
[7]  
Hubbard JH, 1995, DIFFERENTIAL EQUATIO
[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]   Magnetization dynamics with a spin-transfer torque [J].
Li, Z ;
Zhang, S .
PHYSICAL REVIEW B, 2003, 68 (02)
123