scholarly journals Acoustic-Wave-Induced Ferromagnetic-Resonance-Assisted Spin-Torque Switching of Perpendicular Magnetic Tunnel Junctions with Anisotropy Variation

2020 ◽  
Vol 14 (1) ◽  
Author(s):  
Walid Al Misba ◽  
Md Mahadi Rajib ◽  
Dhritiman Bhattacharya ◽  
Jayasimha Atulasimha
Keyword(s):  
Acoustic Wave ◽  
Ferromagnetic Resonance ◽  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Spin Torque ◽  
Wave Induced

scholarly journals Surface acoustic wave induced modulation of tunneling magnetoresistance in magnetic tunnel junctions

2021 ◽  
Vol 130 (3) ◽  
pp. 033901
Author(s):  
Dhritiman Bhattacharya ◽  
Peng Sheng ◽  
Md Ahsanul Abeed ◽  
Zhengyang Zhao ◽  
Hongshi Li ◽  
...  
Keyword(s):  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Tunneling Magnetoresistance ◽  
Wave Induced

Nonlinear ferromagnetic resonance induced by spin torque in nanoscale magnetic tunnel junctions

2013 ◽  
Vol 103 (8) ◽  
pp. 082402 ◽  
Author(s):  
X. Cheng ◽  
J. A. Katine ◽  
G. E. Rowlands ◽  
I. N. Krivorotov
Keyword(s):  
Ferromagnetic Resonance ◽  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Spin Torque

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.

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