Intensity distribution, evolution, and dispersion of discrete spin wave modes in nanoscale spin-torque oscillator

2021 ◽  
Vol 129 (24) ◽  
pp. 243903
Author(s):  
Shizhu Qiao ◽  
Lihui Bai ◽  
Haibin Xue ◽  
Lipeng Hou ◽  
Lijuan Zhang ◽  
...  
Keyword(s):  
Spin Wave ◽  
Intensity Distribution ◽  
Spin Torque ◽  
Wave Modes

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.

Synchronization of propagating spin-wave modes in a double-contact spin-torque oscillator: A micromagnetic study

2014 ◽  
Vol 435 ◽  
pp. 44-49 ◽  
Author(s):  
V. Puliafito ◽  
G. Consolo ◽  
L. Lopez-Diaz ◽  
B. Azzerboni
Keyword(s):  
Spin Wave ◽  
Spin Torque ◽  
Wave Modes

Non-stationary excitation of two localized spin-wave modes in a nano-contact spin torque oscillator

2013 ◽  
Vol 114 (15) ◽  
pp. 153906 ◽  
Author(s):  
G. Consolo ◽  
G. Finocchio ◽  
G. Siracusano ◽  
S. Bonetti ◽  
A. Eklund ◽  
...  
Keyword(s):  
Spin Wave ◽  
Spin Torque ◽  
Wave Modes

scholarly journals Engineering the Spectrum of Dipole Field-Localized Spin-Wave Modes to Enable Spin-Torque Antidamping

2017 ◽  
Vol 7 (5) ◽  
Author(s):  
Chi Zhang ◽  
Yong Pu ◽  
Sergei A. Manuilov ◽  
Shane P. White ◽  
Michael R. Page ◽  
...  
Keyword(s):  
Spin Wave ◽  
Dipole Field ◽  
Spin Torque ◽  
Wave Modes

scholarly journals Impact of intragrain spin wave reflections on nanocontact spin torque oscillators

2021 ◽  
Vol 103 (21) ◽  
Author(s):  
Anders J. Eklund ◽  
Mykola Dvornik ◽  
Fatjon Qejvanaj ◽  
Sheng Jiang ◽  
Sunjae Chung ◽  
...  
Keyword(s):  
Spin Wave ◽  
Spin Torque ◽  
Wave Reflections ◽  
Spin Torque Oscillators

scholarly journals Phase resolved observation of spin wave modes in antidot lattices

2021 ◽  
Vol 118 (23) ◽  
pp. 232403
Author(s):  
Felix Groß ◽  
Mateusz Zelent ◽  
Ajay Gangwar ◽  
Sławomir Mamica ◽  
Paweł Gruszecki ◽  
...  
Keyword(s):  
Spin Wave ◽  
Wave Modes

scholarly journals Spin-wave-beam driven synchronization of nanocontact spin-torque oscillators

2015 ◽  
Vol 11 (3) ◽  
pp. 280-286 ◽  
Author(s):  
A. Houshang ◽  
E. Iacocca ◽  
P. Dürrenfeld ◽  
S. R. Sani ◽  
J. Åkerman ◽  
...  
Keyword(s):  
Spin Wave ◽  
Wave Beam ◽  
Spin Torque ◽  
Spin Torque Oscillators

scholarly journals Mutual phase locking of very nonidentical spin torque nanooscillators via spin wave interaction

2014 ◽  
Vol 67 (2) ◽  
pp. 20601 ◽  
Author(s):  
Ansar R. Safin ◽  
Nicolay N. Udalov ◽  
Mikhail V. Kapranov
Keyword(s):  
Spin Wave ◽  
Phase Locking ◽  
Wave Interaction ◽  
Spin Torque
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