NLSTT-MRAM: Robust spin transfer torque MRAM using non-local spin injection for write

2012 ◽  
Author(s):  
Mrigank Sharad ◽  
Georgios Panagopoulos ◽  
Charles Augustine ◽  
Kaushik Roy
Keyword(s):  
Spin Injection ◽  
Spin Transfer Torque ◽  
Spin Transfer ◽  
Local Spin ◽  
Non Local

scholarly journals Local spin transfer torque and magnetoresistance in domain walls with variable width

2020 ◽  
Vol 102 (6) ◽  
Author(s):  
Hamidreza Kazemi ◽  
Sebastian Eggert ◽  
Nicholas Sedlmayr
Keyword(s):  
Domain Walls ◽  
Spin Transfer Torque ◽  
Spin Transfer ◽  
Local Spin

Non-local spin injection in lateral spin valves

2007 ◽  
Vol 40 (5) ◽  
pp. 1280-1284 ◽  
Author(s):  
Y Ji ◽  
A Hoffmann ◽  
J S Jiang ◽  
J E Pearson ◽  
S D Bader
Keyword(s):  
Spin Injection ◽  
Spin Valves ◽  
Local Spin ◽  
Non Local

Nonlinear Damping Generated by Spin Injection in a Pseudo-spin-valve Structure

2007 ◽  
Vol 998 ◽  
Author(s):  
Min Ren ◽  
Lei Zhang ◽  
Jiuning Hu ◽  
Ning Deng ◽  
Hao Dong ◽  
...  
Keyword(s):  
Spin Relaxation ◽  
Spin Injection ◽  
Magnetic Moments ◽  
Spin Valve ◽  
Nonlinear Damping ◽  
Spin Transfer Torque ◽  
Spin Transfer ◽  
Spin Accumulation ◽  
Magnetic Damping ◽  
Magnetic Dynamic

ABSTRACTThe current induced magnetic dynamics of a nano-scale pseudo-spin-valve (PSV) structure was theoretically studied. The spin relaxation mechanisms and the influence of ferromagnetic/nonmagnetic (FM/NM) interfaces on the current polarization were investigated, and a modified magnetic dynamic equation was developed. Both the free layer's local magnetic moments and itinerant electrons' spins were regarded as a macro-spin, whose movement was resulted from two items: spin relaxation due to the magnetic damping and spin accumulation due to the polarized current. The injected current not only produces a spin transfer torque, but also alters the effective magnetic field, and thus affects the damping. Therefore, the damping is nonlinear and correlated to the current. Based on the analysis of the competition between magnetic damping and spin accumulation, the dynamic behaviors of magnetization switching and oscillation can be explained.

Introduction of spin torques

2017 ◽  
Author(s):  
T. Kimura
Keyword(s):  
Angular Momentum ◽  
Giant Magnetoresistance ◽  
Spontaneous Magnetization ◽  
Magnetic Domain ◽  
Magnetic Multilayers ◽  
Transfer Effect ◽  
Spin Transfer Torque ◽  
Spin Transfer ◽  
Spin Angular Momentum ◽  
Spin Torques

This chapter discusses the spin-transfer effect, which is described as the transfer of the spin angular momentum between the conduction electrons and the magnetization of the ferromagnet that occurs due to the conservation of the spin angular momentum. L. Berger, who introduced the concept in 1984, considered the exchange interaction between the conduction electron and the localized magnetic moment, and predicted that a magnetic domain wall can be moved by flowing the spin current. The spin-transfer effect was brought into the limelight by the progress in microfabrication techniques and the discovery of the giant magnetoresistance effect in magnetic multilayers. Berger, at the same time, separately studied the spin-transfer torque in a system similar to Slonczewski’s magnetic multilayered system and predicted spontaneous magnetization precession.

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