Demonstration of edge roughness effect on the magnetization reversal of spin valve submicron wires | Zendy

Te-Hsuan Chiang | Zendy; L. J. Chang | Zendy; Chunhua Yu | Zendy; S. Y. Huang | Zendy; D. C. Chen | Zendy; Y. D. Yao | Zendy; ShangFan Lee | Zendy

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Demonstration of edge roughness effect on the magnetization reversal of spin valve submicron wires

Author(s) -

Te-Hsuan Chiang,

L. J. Chang,

Chunhua Yu,

S. Y. Huang,

D. C. Chen,

Y. D. Yao,

ShangFan Lee

Publication year - 2010

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.3463459

Subject(s) - magnetization , condensed matter physics , surface finish , materials science , domain wall (magnetism) , spin valve , transverse plane , surface roughness , spin (aerodynamics) , micromagnetics , magnetic field , physics , composite material , structural engineering , quantum mechanics , engineering , thermodynamics

We prepared submicron wide trilayer spin valve wires designed with periodic “spikes” as artificial roughness. The height and the pitch of the spikes were varied systematically. No obvious dependence was found between the roughness and the domain wall velocity when the spikes were smaller than a threshold of 30 nm for NiFe. The average velocity was slowed down when the height of the spikes were larger than the threshold. In-plane transverse magnetic fields help to reduce the critical current density for current induced domain-wall motion. Our results could be attributed to the space modulation of the local magnetization.

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