Effect of bias-induced spin flips on spin torque: Enhancement of current and spin transfer in magnetic tunnel junctions

2006 ◽  
Vol 74 (22) ◽  
Author(s):  
Peter M. Levy ◽  
Albert Fert
Keyword(s):  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Spin Transfer ◽  
Spin Torque ◽  
Spin Flips

scholarly journals Time-resolved measurement of spin-transfer-driven ferromagnetic resonance and spin torque in magnetic tunnel junctions

2011 ◽  
Vol 7 (6) ◽  
pp. 496-501 ◽  
Author(s):  
Chen Wang ◽  
Yong-Tao Cui ◽  
Jordan A. Katine ◽  
Robert A. Buhrman ◽  
Daniel C. Ralph
Keyword(s):  
Ferromagnetic Resonance ◽  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Spin Transfer ◽  
Spin Torque ◽  
Time Resolved

scholarly journals Electrical characterisation of higher order spin wave modes in vortex-based magnetic tunnel junctions

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Alex. S. Jenkins ◽  
Lara San Emeterio Alvarez ◽  
Samh Memshawy ◽  
Paolo Bortolotti ◽  
Vincent Cros ◽  
...  
Keyword(s):  
Spin Wave ◽  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Higher Order ◽  
Spin Torque ◽  
Micromagnetic Simulations ◽  
Higher Order Modes ◽  
Spin Diode ◽  
Super High Frequency ◽  
Wave Modes

AbstractNiFe-based vortex spin-torque nano-oscillators (STNO) have been shown to be rich dynamic systems which can operate as efficient frequency generators and detectors, but with a limitation in frequency determined by the gyrotropic frequency, typically sub-GHz. In this report, we present a detailed analysis of the nature of the higher order spin wave modes which exist in the Super High Frequency range (3–30 GHz). This is achieved via micromagnetic simulations and electrical characterisation in magnetic tunnel junctions, both directly via the spin-diode effect and indirectly via the measurement of the coupling with the gyrotropic critical current. The excitation mechanism and spatial profile of the modes are shown to have a complex dependence on the vortex core position. Additionally, the inter-mode coupling between the fundamental gyrotropic mode and the higher order modes is shown to reduce or enhance the effective damping depending upon the sense of propagation of the confined spin wave.

scholarly journals Micromagnetic instabilities in spin-transfer switching of perpendicular magnetic tunnel junctions

2021 ◽  
Vol 103 (1) ◽  
Author(s):  
Nahuel Statuto ◽  
Jamileh Beik Mohammadi ◽  
Andrew D. Kent
Keyword(s):  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Spin Transfer

scholarly journals Macrospin model to explain the absence of preswitching oscillations in magnetic tunnel junctions: Fieldlike spin-transfer torque

2009 ◽  
Vol 79 (10) ◽  
Author(s):  
Samir Garzon ◽  
Yaroslaw Bazaliy ◽  
Richard A. Webb ◽  
Mark Covington ◽  
Shehzaad Kaka ◽  
...  
Keyword(s):  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Spin Transfer Torque ◽  
Spin Transfer
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