Direct imaging of stochastic domain-wall motion driven by nanosecond current pulses

被引:208
作者
Meier, Guido
Bolte, Markus
Eiselt, Rene
Krueger, Benjamin
Kim, Dong-Hyun
Fischer, Peter
机构
[1] Univ Hamburg, Inst Angew Phys, D-20355 Hamburg, Germany
[2] Univ Hamburg, Zentrum Mikrostrukturforsch, D-20355 Hamburg, Germany
[3] Univ Hamburg, Inst Theoret Phys 1, D-20355 Hamburg, Germany
[4] Chungbuk Natl Univ, Dept Phys, Cheongju 361763, South Korea
[5] Chungbuk Natl Univ, Inst Basic Res, Cheongju 361763, South Korea
[6] Univ Calif Berkeley, Lawrence Berkeley Lab, Ctr Xray Opt, Berkeley, CA 94720 USA
关键词
D O I
10.1103/PhysRevLett.98.187202
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Magnetic transmission x-ray microscopy is used to directly visualize the influence of a spin-polarized current on domain walls in curved permalloy wires. Pulses of nanosecond duration and of high current density up to 1.0x10(12) A/m(2) are used to move and to deform the domain wall. The current pulse drives the wall either undisturbed, i.e., as composite particle through the wire, or causes structural changes of the magnetization. Repetitive pulse measurements reveal the stochastic nature of current-induced domain-wall motion.
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页数:4
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