scholarly journals Spin-transfer-torque resonant switching and injection locking in the presence of a weak external microwave field for spin valves with perpendicular materials

2010 ◽  
Vol 82 (9) ◽  
Author(s):  
Mario Carpentieri ◽  
Giovanni Finocchio ◽  
Bruno Azzerboni ◽  
Luis Torres
Keyword(s):  
Microwave Field ◽  
Injection Locking ◽  
Spin Transfer Torque ◽  
Spin Transfer ◽  
Spin Valves ◽  
Resonant Switching

Thermal spin-transfer torque driven by the spin-dependent Seebeck effect in metallic spin-valves

2015 ◽  
Vol 11 (7) ◽  
pp. 576-581 ◽  
Author(s):  
Gyung-Min Choi ◽  
Chul-Hyun Moon ◽  
Byoung-Chul Min ◽  
Kyung-Jin Lee ◽  
David G. Cahill
Keyword(s):  
Spin Transfer Torque ◽  
Seebeck Effect ◽  
Spin Transfer ◽  
Spin Valves

Resonant excitation of coupled skyrmions by spin-transfer torque

2016 ◽  
Vol 30 (02) ◽  
pp. 1550254 ◽  
Author(s):  
Y. Y. Dai ◽  
H. Wang ◽  
T. Yang ◽  
Z. D. Zhang
Keyword(s):  
Microwave Field ◽  
Amplitude Ratio ◽  
Alternating Current ◽  
Spin Transfer Torque ◽  
Spin Transfer ◽  
Resonant Excitation ◽  
Dual Frequency ◽  
Magnetostatic Interaction ◽  
Micromagnetic Simulations

Resonant excitations of coupled skyrmions in Co/Ru/Co nanodisks activated by spin-transfer torque (STT) have been studied by micromagnetic simulations. It is found that STT is an effective method to manipulate skyrmion dynamics. Unlike the dynamics driven by a microwave field, two skyrmions with opposite chiralities move synchronously in the same direction when they are driven by STT, which makes it easier to observe the dynamics of coupled skyrmions in experiments. Resonant excitations of coupled skyrmions can be controlled by changing the frequency or amplitude ratio of a dual-frequency alternating current (AC). In addition, the magnetostatic interaction between the two skyrmions plays an important role in the dynamics of coupled skyrmions.

scholarly journals Feedback control of noise in spin valves by the spin-transfer torque

2011 ◽  
Vol 98 (8) ◽  
pp. 083110 ◽  
Author(s):  
Swarnali Bandopadhyay ◽  
Arne Brataas ◽  
Gerrit E. W. Bauer
Keyword(s):  
Feedback Control ◽  
Spin Transfer Torque ◽  
Spin Transfer ◽  
Spin Valves

Steady-state domain wall motion driven by adiabatic spin-transfer torque with assistance of microwave field

2013 ◽  
Vol 103 (26) ◽  
pp. 262408 ◽  
Author(s):  
Xi-guang Wang ◽  
Guang-hua Guo ◽  
Yao-zhuang Nie ◽  
D. Wang ◽  
Qing-lin Xia ◽  
...  
Keyword(s):  
Steady State ◽  
Domain Wall ◽  
Wall Motion ◽  
Microwave Field ◽  
Domain Wall Motion ◽  
Spin Transfer Torque ◽  
Spin Transfer

Spin-Transfer-Torque Driven Vortex Dynamics in Electrodeposited Nanowire Spin-Valves

SPIN ◽  
2017 ◽  
Vol 07 (01) ◽  
pp. 1740007 ◽  
Author(s):  
Flavio Abreu Araujo ◽  
Luc Piraux
Keyword(s):  
Magnetic Field ◽  
Porous Alumina ◽  
Spin Transfer Torque ◽  
Spin Transfer ◽  
Microwave Emission ◽  
Spin Valves ◽  
Zero Magnetic Field ◽  
Micromagnetic Simulations ◽  
Magnetic Layers ◽  
In Series

A bottom-up approach for the fabrication of an assembly of electrodeposited nanowires has been combined to single nanowire electrical connection techniques to investigate the spin-transfer-torque and microwave emission of specially designed nanowires containing Co/Cu/Co pseudo spin-valves (SVs). Porous alumina templates are used for the growth by electrodeposition of metallic in-series connected SVs. Under specific magnetic field and injected current conditions, emission of microwave current is detected with frequency in the GHz range and linewidth as low as 1.8[Formula: see text]MHz. Microwave signals have been obtained even at zero magnetic field and high frequency versus magnetic field tunability was demonstrated. Our findings are in good agreement with micromagnetic simulations. In addition, it appears that in our particular geometry, the microwave emission is generated by the vortex gyrotropic motion which occurs in, at least, one of the two magnetic layers of our SV structures.

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