Time-resolved imaging of spin transfer switching:: Beyond the macrospin concept

被引：130

作者：

Acremann, Y ^{[1
]}

Strachan, JP

Chembrolu, V

Andrews, SD

Tyliszczak, T

Katine, JA

Carey, MJ

Clemens, BM

Siegmann, HC

Stöhr, J

机构：

[1] Stanford Synchrotron Radiat Lab, Stanford, CA 94309 USA

[2] Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA

[3] Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA

[4] Adv Light Source, Berkeley, CA 94720 USA

[5] Hitachi Global Storage Technol, San Jose Res Ctr, San Jose, CA 95120 USA

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 96卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.96.217202

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Time-resolved images of the magnetization switching process in a spin transfer structure, obtained by ultrafast x-ray microscopy, reveal the limitations of the macrospin model. Instead of a coherent magnetization reversal, we observe switching by lateral motion of a magnetic vortex across a nanoscale element. Our measurements reveal the fundamental roles played independently by the torques due to charge and spin currents in breaking the magnetic symmetry on picosecond time scales.

引用

页数：4

共 26 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] Vortex core-driven magnetization dynamics [J].

Choe, SB ;

Acremann, Y ;

Scholl, A ;

Bauer, A ;

Doran, A ;

Stöhr, J ;

Padmore, HA .

SCIENCE, 2004, 304 (5669) :420-422

[3] 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

[4] Temperature study of the spin-transfer switching speed from dc to 100 ps [J].

Devolder, T ;

Tulapurkar, A ;

Suzuki, Y ;

Chappert, C ;

Crozat, P ;

Yagami, K .

JOURNAL OF APPLIED PHYSICS, 2005, 98 (05)

[5] Ultra-fast magnetization reversal in magnetic nano-pillars by spin-polarized current [J].

Devolder, T ;

Tulapurkar, A ;

Yagami, K ;

Crozat, P ;

Chappert, C ;

Fukushima, A ;

Suzuki, Y .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2005, 286 :77-82

[6] Magnetic bistability of Co nanodots [J].

Ding, HF ;

Schmid, AK ;

Li, DQ ;

Guslienko, KY ;

Bader, SD .

PHYSICAL REVIEW LETTERS, 2005, 94 (15)

[7] 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

[8]

HILLEBRANDS B, 2005, SPIN TRANSFER TORQUE, V3

[9] 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

[10] Interferometer-controlled scanning transmission X-ray microscopes at the Advanced Light Source [J].

Kilcoyne, ALD ;

Tyliszczak, T ;

Steele, WF ;

Fakra, S ;

Hitchcock, P ;

Franck, K ;

Anderson, E ;

Harteneck, B ;

Rightor, EG ;

Mitchell, GE ;

Hitchcock, AP ;

Yang, L ;

Warwick, T ;

Ade, H .

JOURNAL OF SYNCHROTRON RADIATION, 2003, 10 :125-136

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