Nonlinear bias dependence of spin-transfer torque from atomic first principles

Details Nonlinear bias dependence of spin-transfer torque from atomic first principles Nonlinear bias dependence of spin-transfer torque from atomic first principles

2011-05-20

arxiv.org/abs/1105.4051v2

Phys. Rev. B 84, 014401 (2011)

Physics

Condensed Matter

Materials Science

6page,4figures

Scientific paper

10.1103/PhysRevB.84.014401

We report first-principles analysis on the bias dependence of spin-transfer torque (STT) in Fe/MgO/Fe magnetic tunnel junctions. The in-plane STT changes from linear to nonlinear dependence as the bias voltage is increased from zero. The angle dependence of STT is symmetric at low bias but asymmetric at high bias. The nonlinear behavior is marked by a threshold point in the STT versus bias curve. The high-bias nonlinear STT is found to be controlled by a resonant transmission channel in the anti-parallel configuration of the magnetic moments. Disorder scattering due to oxygen vacancies in MgO significantly changes the STT threshold bias.

Affiliated with

Also associated with

No associations

Rating

Nonlinear bias dependence of spin-transfer torque from atomic first principles does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Nonlinear bias dependence of spin-transfer torque from atomic first principles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nonlinear bias dependence of spin-transfer torque from atomic first principles will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-649180