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Effect of nonadiabatic spin transfer torque on domain wall resonance frequency and mass

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3 Author(s)
Jamali, Mahdi ; Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore 117576 ; Lee, Kyung-Jin ; Yang, Hyunsoo

Your organization might have access to this article on the publisher's site. To check, click on this link:http://dx.doi.org/+10.1063/1.3560305 

The dynamics of a magnetic domain wall in a semi circular nanowire loop is studied by an analytical model and micromagnetic simulations. We find a damped sinusoidal oscillation of the domain wall for small displacement angles around its equilibrium position under an external magnetic field in the absence of currents. By studying the effect of current induced nonadiabatic spin transfer torque on the magnetic domain wall resonance frequency and mass, a redshift is found in the resonance frequency and domain wall mass increases by increasing the ratio of nonadiabatic spin torque to adiabatic contribution above 1.

Published in:

Applied Physics Letters  (Volume:98 ,  Issue: 9 )

Date of Publication:

Feb 2011

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