Thermally assisted magnetization reversal in the presence of a spin-transfer torque
Z. Li,Shufeng Zhang +1 more
TLDR
In this article, a generalized stochastic Landau-Lifshitz equation and its corresponding Fokker-Planck equation were proposed for the magnetization dynamics in the presence of spin-transfer torques.Abstract:
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\'eel-Brown relaxation formula remains valid as long as we replace the temperature by an effective one that is linearly dependent on 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.read more
Citations
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Spin transfer torques
Daniel C. Ralph,Mark D. Stiles +1 more
TL;DR: In this paper, the physics of spin transfer torque in magnetic devices are discussed and an elementary discussion of the mechanism and experimental progress in this field is provided, along with a review of theoretical and experimental results.
Journal ArticleDOI
Nonlocal magnetization dynamics in ferromagnetic heterostructures
TL;DR: In this article, the role of spin pumping in layered structures is discussed and the main body of the theory is semiclassical and based on a mean-field Stoner or spin-density functional picture, but quantum-size effects and electron-electron correlations are also discussed.
Journal ArticleDOI
Spin-torque building blocks
TL;DR: By assembling magnetic nanodevices as building blocks with different functionalities, novel types of computing architecture can be envisaged, focus in particular on recent concepts such as magnonics and spintronic neural networks.
Journal ArticleDOI
Perpendicular magnetic anisotropy at transition metal/oxide interfaces and applications
Bernard Dieny,Mairbek Chshiev +1 more
TL;DR: In this paper, a review of magnetic magnetic anisotropy at magnetic metal/oxide interfaces is presented, along with some applications of this interfacial PMA in STT-MRAM.
Journal ArticleDOI
Spin-transfer torque switching in magnetic tunnel junctions and spin-transfer torque random access memory
Zhitao Diao,Zhanjie Li,Shengyuang Wang,Yunfei Ding,Alex Panchula,Eugene Chen,Lien-Chang Wang,Yiming Huai +7 more
TL;DR: In this paper, experimental and numerical results of current-driven magnetization switching in magnetic tunnel junctions were presented, and three distinct switching modes, thermal activation, dynamic reversal, and precessional process, were identified within the experimental parameter space.
References
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