scholarly journals Spin-orbit torque magnetization switching of a three-terminal perpendicular magnetic tunnel junction

2014 ◽  
Vol 104 (4) ◽  
pp. 042406 ◽  
Author(s):  
Murat Cubukcu ◽  
Olivier Boulle ◽  
Marc Drouard ◽  
Kevin Garello ◽  
Can Onur Avci ◽  
...  
Keyword(s):  
Tunnel Junction ◽  
Magnetic Tunnel Junction ◽  
Spin Orbit ◽  
Magnetization Switching

scholarly journals Domain wall-magnetic tunnel junction spin–orbit torque devices and circuits for in-memory computing

2021 ◽  
Vol 118 (11) ◽  
pp. 112401
Author(s):  
Mahshid Alamdar ◽  
Thomas Leonard ◽  
Can Cui ◽  
Bishweshwor P. Rimal ◽  
Lin Xue ◽  
...  
Keyword(s):  
Domain Wall ◽  
Tunnel Junction ◽  
Magnetic Tunnel Junction ◽  
Spin Orbit

scholarly journals Voltage Controlled Domain Wall Motion based Neuron and Stochastic Magnetic Tunnel Junction Synapse for Neuromorphic Computing Applications

2021 ◽  
Author(s):  
Aijaz Lone ◽  
Selma Amara ◽  
Hossein Fariborzi
Keyword(s):  
Domain Wall ◽  
Tunnel Junction ◽  
Thermal Noise ◽  
Wall Motion ◽  
Magnetic Tunnel Junction ◽  
Domain Wall Motion ◽  
Spin Orbit ◽  
Free Layer ◽  
Digit Recognition ◽  
Transport Studies

The present work discusses the proposal of a spintronic neuromorphic system with spin orbit torque driven domain wall motion-based neuron and synapse. We propose a voltage-controlled magnetic anisotropy domain wall motion based magnetic tunnel junction neuron. We investigate how the electric field at the gate (pinning site), generated by the voltage signals from pre-neurons, modulates the domain wall motion, which reflects in the non-linear switching behaviour of neuron magnetization. For the implementation of synaptic weights, we propose 3-terminal MTJ with stochastic domain wall motion in the free layer. We incorporate intrinsic pinning effects by creating triangular notches on the sides of the free layer. The pinning of domain wall and intrinsic thermal noise of device lead to the stochastic behaviour of domain wall motion. The control of this stochasticity by the spin orbit torque is shown to realize the potentiation and depression of the synaptic weight. The micromagnetics and spin transport studies in synapse and neuron are carried out by developing a coupled micromagnetic Non-Equilibrium Green’s Function (<i>MuMag-NEGF</i>) model. The minimization of the writing current pulse width by leveraging the thermal noise and demagnetization energy is also presented. Finally, we discuss the implementation of digit recognition by the proposed system using a spike time dependent algorithm.

scholarly journals Anomalous and spin Hall effects in a magnetic tunnel junction with Rashba spin-orbit coupling

2013 ◽  
Vol 103 (3) ◽  
pp. 032406 ◽  
Author(s):  
A. V. Vedyayev ◽  
M. S. Titova ◽  
N. V. Ryzhanova ◽  
M. Ye. Zhuravlev ◽  
E. Y. Tsymbal
Keyword(s):  
Tunnel Junction ◽  
Magnetic Tunnel Junction ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Rashba Spin ◽  
Hall Effects ◽  
Spin Hall Effects
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