Switching-current reduction in perpendicular-anisotropy spin torque magnetic tunnel junctions

2010 ◽  
Vol 108 (1) ◽  
pp. 014305 ◽  
Author(s):  
O. G. Heinonen ◽  
D. V. Dimitrov
Keyword(s):  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Spin Torque ◽  
Perpendicular Anisotropy ◽  
Switching Current ◽  
Current Reduction

Switching current reduction using perpendicular anisotropy in CoFeB–MgO magnetic tunnel junctions

2011 ◽  
Vol 98 (11) ◽  
pp. 112507 ◽  
Author(s):  
P. Khalili Amiri ◽  
Z. M. Zeng ◽  
J. Langer ◽  
H. Zhao ◽  
G. Rowlands ◽  
...  
Keyword(s):  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Perpendicular Anisotropy ◽  
Switching Current ◽  
Current Reduction

Reducing spin-torque switching current by incorporating an ultra-thin Ta layer with CoFeB free layer in magnetic tunnel junctions

2014 ◽  
Vol 105 (24) ◽  
pp. 242411 ◽  
Author(s):  
R. S. Liu ◽  
H. Meng ◽  
V. B. Naik ◽  
C. H. Sim ◽  
S. Yap ◽  
...  
Keyword(s):  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Spin Torque ◽  
Free Layer ◽  
Switching Current

Switching current reduction using MgO cap layer in magnetic tunnel junctions

2018 ◽  
Vol 112 (24) ◽  
pp. 242408 ◽  
Author(s):  
Like Zhang ◽  
Bin Fang ◽  
Jialin Cai ◽  
Zhongming Zeng
Keyword(s):  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Switching Current ◽  
Cap Layer ◽  
Current Reduction

Spin torque switching of 20 nm magnetic tunnel junctions with perpendicular anisotropy

2012 ◽  
Vol 100 (13) ◽  
pp. 132408 ◽  
Author(s):  
M. Gajek ◽  
J. J. Nowak ◽  
J. Z. Sun ◽  
P. L. Trouilloud ◽  
E. J. O’Sullivan ◽  
...  
Keyword(s):  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Spin Torque ◽  
Perpendicular Anisotropy ◽  
20 Nm

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.

Properties of perpendicular-anisotropy magnetic tunnel junctions fabricated over the bottom electrode contact

2015 ◽  
Vol 54 (4S) ◽  
pp. 04DM06 ◽  
Author(s):  
Sadahiko Miura ◽  
Hiroaki Honjo ◽  
Keizo Kinoshita ◽  
Keiichi Tokutome ◽  
Hiroaki Koike ◽  
...  
Keyword(s):  
Bottom Electrode ◽  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Perpendicular Anisotropy ◽  
Electrode Contact
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