scholarly journals Bias dependence of perpendicular spin torque and of free- and fixed-layer eigenmodes in MgO-based nanopillars

2011 ◽  
Vol 83 (18) ◽  
Author(s):  
P. K. Muduli ◽  
O. G. Heinonen ◽  
Johan Åkerman
Keyword(s):  
Spin Torque ◽  
Fixed Layer

Spin-torque oscillator with tilted fixed layer magnetization

2008 ◽  
Vol 92 (26) ◽  
pp. 262508 ◽  
Author(s):  
Yan Zhou ◽  
C. L. Zha ◽  
S. Bonetti ◽  
J. Persson ◽  
Johan Åkerman
Keyword(s):  
Spin Torque ◽  
Fixed Layer ◽  
Layer Magnetization

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
Sign in / Sign up

Export Citation Format

Share Document