scholarly journals Lack of Simple Correlation between Switching Current Density and Spin-Orbit-Torque Efficiency of Perpendicularly Magnetized Spin-Current-Generator–Ferromagnet Heterostructures

2021 ◽  
Vol 15 (2) ◽  
Author(s):  
Lijun Zhu ◽  
D.C. Ralph ◽  
R.A. Buhrman
Keyword(s):  
Current Density ◽  
Spin Current ◽  
Spin Orbit ◽  
Current Generator ◽  
Simple Correlation ◽  
Switching Current

SPIN CURRENT INDUCED ELECTRIC FIELD IN A RASHBA QUANTUM WIRE

2010 ◽  
Vol 24 (07) ◽  
pp. 649-656
Author(s):  
XI FU ◽  
GUANGHUI ZHOU
Keyword(s):  
Electric Field ◽  
Current Density ◽  
Quantum Wire ◽  
Spin Current ◽  
Scattering Matrix ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Rashba Spin

We investigate theoretically the spin current and spin current induced electric field in a weak Rashba spin-orbit coupling quantum wire (QW) using a definition for spin current by means of scattering matrix. It is found that there exists two non-zero linear spin current density elements which have oscillation peaks at the center of QW and their strengths can be changed by the number of propagation modes and Rashba constant, respectively. Moreover, the spin current induced electric field has also been calculated and its strength is measurable with present technology with which can be used to detect spin current.

scholarly journals Critical switching current density of magnetic tunnel junction with shape perpendicular magnetic anisotropy through the combination of spin-transfer and spin-orbit torques

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Doo Hyung Kang ◽  
Mincheol Shin
Keyword(s):  
Magnetic Anisotropy ◽  
Current Density ◽  
Perpendicular Magnetic Anisotropy ◽  
Magnetic Tunnel Junction ◽  
Spin Transfer Torque ◽  
Spin Transfer ◽  
Spin Orbit ◽  
Switching Current ◽  
20 Nm ◽  
Hybrid Switching

AbstractRecently, magnetic tunnel junctions (MTJs) with shape perpendicular magnetic anisotropy (S-PMA) have been studied extensively because they ensure high thermal stability at junctions smaller than 20 nm. Furthermore, spin-transfer torque (STT) and spin-orbit torque (SOT) hybrid switching, which guarantees fast magnetization switching and deterministic switching, has recently been achieved in experiments. In this study, the critical switching current density of the MTJ with S-PMA through the interplay of STT and SOT was investigated using theoretical and numerical methods. As the current density inducing SOT ($$J_{\text {SOT}}$$ J SOT ) increases, the critical switching current density inducing STT ($$J_{\text {STT,c}}$$ J STT,c ) decreases. Furthermore, for a given $$J_{\text {SOT}}$$ J SOT , $$J_{\text {STT,c}}$$ J STT,c increases with increasing thickness, whereas $$J_{\text {STT,c}}$$ J STT,c decreases as the diameter increases. Moreover, $$J_{\text {STT,c}}$$ J STT,c in the plane of thickness and spin-orbit field-like torque ($$\beta$$ β ) was investigated for a fixed $$J_{\text {SOT}}$$ J SOT and diameter. Although $$J_{\text {STT,c}}$$ J STT,c decreases with increasing $$\beta$$ β , $$J_{\text {STT,c}}$$ J STT,c slowly increases with increasing thickness and increasing $$\beta$$ β . The power consumption was investigated as a function of thickness and diameter at the critical switching current density. Experimental confirmation of these results using existing experimental techniques is anticipated.

scholarly journals Modulated switching current density and spin-orbit torques in MnGa/Ta films with inserting ferromagnetic layers

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Kangkang Meng ◽  
Jun Miao ◽  
Xiaoguang Xu ◽  
Yong Wu ◽  
Jiaxing Xiao ◽  
...  
Keyword(s):  
Current Density ◽  
Spin Orbit ◽  
Switching Current ◽  
Ferromagnetic Layers

Persistent Spin Current in a Quantum Wire with Weak Rashba Spin–Orbit Coupling

2006 ◽  
Vol 23 (11) ◽  
pp. 3065-3068 ◽  
Author(s):  
Wang Yi ◽  
Sheng Wei ◽  
Zhou Guang-Hui
Keyword(s):  
Quantum Wire ◽  
Spin Current ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Rashba Spin

scholarly journals Analysis of Bose system in spin-orbit coupled Bose-Fermi mixture to induce a spin current of fermions

2018 ◽  
Vol 969 ◽  
pp. 012014 ◽  
Author(s):  
R Sakamoto ◽  
Y Ono ◽  
R Hatsuda ◽  
K Shiina ◽  
E Arahata ◽  
...  
Keyword(s):  
Spin Current ◽  
Bose System ◽  
Spin Orbit
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