Spin transfer effects in current perpendicular to the plane spin valves

被引:11
作者
Covington, M [1 ]
AlHajDarwish, M [1 ]
Ding, Y [1 ]
Rebei, A [1 ]
Parker, GJ [1 ]
Gokemeijer, N [1 ]
Seigler, MA [1 ]
机构
[1] Seagate Res, Pittsburgh, PA 15222 USA
关键词
spin momentum transfer; giant magnetoresistance; current perpendicular to the plane; spin valve; magnetization dynamics;
D O I
10.1016/j.jmmm.2004.10.053
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We present experimental and numerical micromagnetic data that illustrate manifestations of spin momentum transfer in current perpendicular to the plane spin valves. Noise measurements confirm predictions of current induced magnetization dynamics due to spin torque, where the dynamics are observable only for those combinations of current direction and magnetic configuration in which spin transfer acts to reorient the free layer magnetization away from the direction set by the net magnetic field. The evolution of the amplitude and spectral characteristics of the noise with varying current and magnetic configuration are also discussed. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码:325 / 332
页数:8
相关论文
共 23 条
[11]   Angular dependence of spin-transfer switching in a magnetic nanostructure [J].
Mancoff, FB ;
Dave, RW ;
Rizzo, ND ;
Eschrich, TC ;
Engel, BN ;
Tehrani, S .
APPLIED PHYSICS LETTERS, 2003, 83 (08) :1596-1598
[12]   Current-induced transverse spin-wave instability in a thin nanomagnet [J].
Polianski, ML ;
Brouwer, PW .
PHYSICAL REVIEW LETTERS, 2004, 92 (02) :4
[13]   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
[14]   Current-driven excitation of magnetic multilayers [J].
Slonczewski, JC .
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1996, 159 (1-2) :L1-L7
[15]   White-noise magnetization fluctuations in magnetoresistive heads [J].
Smith, N ;
Arnett, P .
APPLIED PHYSICS LETTERS, 2001, 78 (10) :1448-1450
[16]   Phenomenological theory of current-induced magnetization precession [J].
Stiles, MD ;
Xiao, J ;
Zangwill, A .
PHYSICAL REVIEW B, 2004, 69 (05)
[17]   Temperature and field dependence of high-frequency magnetic noise in spin valve devices [J].
Stutzke, N ;
Burkett, SL ;
Russek, SE .
APPLIED PHYSICS LETTERS, 2003, 82 (01) :91-93
[18]   Spin-current interaction with a monodomain magnetic body: A model study [J].
Sun, JZ .
PHYSICAL REVIEW B, 2000, 62 (01) :570-578
[19]   Batch-fabricated spin-injection magnetic switches [J].
Sun, JZ ;
Monsma, DJ ;
Abraham, DW ;
Rooks, MJ ;
Koch, RH .
APPLIED PHYSICS LETTERS, 2002, 81 (12) :2202-2204
[20]   Excitation of a magnetic multilayer by an electric current [J].
Tsoi, M ;
Jansen, AGM ;
Bass, J ;
Chiang, WC ;
Seck, M ;
Tsoi, V ;
Wyder, P .
PHYSICAL REVIEW LETTERS, 1998, 80 (19) :4281-4284