Microwave generation of tilted-polarizer spin torque oscillator

2009 ◽  
Vol 105 (7) ◽  
pp. 07D116 ◽  
Author(s):  
Yan Zhou ◽  
C. L. Zha ◽  
S. Bonetti ◽  
J. Persson ◽  
Johan Åkerman
Keyword(s):  
Spin Torque ◽  
Microwave Generation

Angular dependence of the microwave-generation threshold in a nanoscale spin-torque oscillator

2007 ◽  
Vol 76 (2) ◽  
Author(s):  
G. Gerhart ◽  
E. Bankowski ◽  
G. A. Melkov ◽  
V. S. Tiberkevich ◽  
A. N. Slavin
Keyword(s):  
Angular Dependence ◽  
Spin Torque ◽  
Microwave Generation ◽  
Generation Threshold

High Power Microwave Generation by Double-Anode Virtual Cathode Oscillator

2019 ◽  
Vol 139 (10) ◽  
pp. 421-427
Author(s):  
Kazuki Nagao ◽  
Wataru Takatsu ◽  
Pham Van Thuan ◽  
Taichi Sugai ◽  
Weihua Jiang
Keyword(s):  
High Power ◽  
Virtual Cathode ◽  
High Power Microwave ◽  
Microwave Generation ◽  
Power Microwave

Spin Torque Nano Oscillators as Potential Terahertz (THz) Communications Devices

2009 ◽  
Author(s):  
Alma E. Wickenden ◽  
Chris Fazi ◽  
Ben Huebschman ◽  
Roger Kaul ◽  
Andrew C. Perrella ◽  
...  
Keyword(s):  
Spin Torque ◽  
Thz Communications

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 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
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