Thermally assisted magnetization reversal in the presence of a spin-transfer torque

Details Thermally assisted magnetization reversal in the presence of a spin-transfer torque Thermally assisted magnetization reversal in the presence of a spin-transfer torque

2003-02-17

arxiv.org/abs/cond-mat/0302339v2

Physical Review B69, 134416 (2004)

Physics

Condensed Matter

Materials Science

5 figures

Scientific paper

10.1103/PhysRevB.69.134416

We propose a generalized stochastic Landau-Lifshitz equation and its corresponding Fokker-Planck equation for the magnetization dynamics in the presence of spin transfer torques. Since the spin transfer torque can pump a magnetic energy into the magnetic system, the equilibrium temperature of the magnetic system is ill-defined. We introduce an effective temperature based on a stationary solution of the Fokker-Planck equation. In the limit of high energy barriers, the law of thermal agitation is derived. We find that the N\'{e}el-Brown relaxation formula remains valid as long as we replace the temperature by an effective one that is linearly dependent of the spin torque. We carry out the numerical integration of the stochastic Landau-Lifshitz equation to support our theory. Our results agree with existing experimental data.

Affiliated with

Also associated with

No associations

Rating

Thermally assisted magnetization reversal in the presence of a spin-transfer torque 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 Thermally assisted magnetization reversal in the presence of a spin-transfer torque, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thermally assisted magnetization reversal in the presence of a spin-transfer torque will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-381241