Spin-current-induced magnetization reversal in magnetic nanowires with constrictions
Spin-current-induced magnetization reversal in magnetic nanowires with constrictions
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Date
2005-05-05
Authors
Florez, S. H.
Krafft, C.
Gomez, R. D.
Advisor
Citation
S. H. Florez, C. Krafft, and R. D. Gomez*, “Spin Current Induced Magnetization Reversal in Magnetic Nanowires with Constrictions”, Journal of Applied Physics 97, 2005, 10C705.
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Abstract
We have performed experiments on current-induced domain-wall motion sCIDWMd in the case of
the domain walls sDWd trapped within the nanoscale constrictions in patterned NiFe structures.
Direct observation of current-induced magnetization reversal was achieved and critical current
densities jc were measured in the presence of easy-axis magnetic fields. The direction of CIDWM
was found to be along the direction of the electron motion in absence of an applied magnetic field
and in the direction of the field when in the presence of even relatively weak fields. Data for the field
dependence of jc for both uniform and fast rising pulses suggest that the current, regardless of
polarity, assists in the depinning of the DW. Only for the dc case does the data strongly reveal the
influence of the electron pressure in promoting or hindering DW motion.