Current-induced magnetic skyrmions oscillator

S Zhang, J Wang, Q Zheng, Q Zhu, X Liu… - New Journal of …, 2015 - iopscience.iop.org
Spin transfer nano-oscillators (STNOs) are nanoscale devices which are promising
candidates for onchip microwave signal sources. For application purposes, they are …

Magnetic vortex oscillators

G Hrkac, PS Keatley, MT Bryan… - Journal of Physics D …, 2015 - iopscience.iop.org
The magnetic vortex has sparked the interest of the academic and industrial communities
over the last few decades. From their discovery in the 1970s for bubble memory devices to …

Efficient synchronization of dipolarly coupled vortex-based spin transfer nano-oscillators

N Locatelli, A Hamadeh, F Abreu Araujo… - Scientific reports, 2015 - nature.com
Due to their nonlinear properties, spin transfer nano-oscillators can easily adapt their
frequency to external stimuli. This makes them interesting model systems to study the effects …

Three-dimensional observation of magnetic vortex cores in stacked ferromagnetic discs

T Tanigaki, Y Takahashi, T Shimakura, T Akashi… - Nano Letters, 2015 - ACS Publications
Electron holographic vector field electron tomography visualized three-dimensional (3D)
magnetic vortices in stacked ferromagnetic discs in a nanoscale pillar. A special holder with …

Spin-torque-induced dynamics at fine-split frequencies in nano-oscillators with two stacked vortices

V Sluka, A Kákay, AM Deac, DE Bürgler… - Nature …, 2015 - nature.com
The gyrotropic rotation around the equilibrium position constitutes the fundamental
excitation of magnetic vortices in nanostructures. The frequency of this mode varies with …

Critical current and linewidth reduction in spin-torque nano-oscillators by delayed self-injection

G Khalsa, MD Stiles, J Grollier - Applied Physics Letters, 2015 - pubs.aip.org
Based on theoretical models, the dynamics of spin-torque nano-oscillators can be
substantially modified by re-injecting the emitted signal to the input of the oscillator after …

Optimizing magnetodipolar interactions for synchronizing vortex based spin-torque nano-oscillators

FA Araujo, AD Belanovsky, PN Skirdkov, KA Zvezdin… - Physical Review B, 2015 - APS
We report on a theoretical study of the magnetodipolar coupling and synchronization
between two vortex-based spin-torque nano-oscillators (STVOs). In this work we study the …

[HTML][HTML] Skyrmion stability in nanocontact spin-transfer oscillators

CP Chui, Y Zhou - AIP Advances, 2015 - pubs.aip.org
We investigate the conditions for nanocontact spin-transfer oscillators (NC-STOs) that allow
for stabilization of a skyrmion. Emphasis is made on the breathing mode, which can be …

Effect of Dzyaloshinskii-Moriya interaction on the magnetic vortex oscillator driven by spin-polarized current

S Chen, S Zhang, Q Zhu, X Liu, C Jin… - Journal of Applied …, 2015 - pubs.aip.org
By micromagnetic simulation, we investigated the dynamic of magnetic vortex driven by spin-
polarized current in Permalloy nanodisks in the presence of interfacial/superficial …

Improved Spectral Stability in Spin-Transfer Nano-Oscillators: Single Vortex Versus Coupled Vortices Dynamics

N Locatelli, R Lebrun, VV Naletov… - IEEE Transactions …, 2015 - ieeexplore.ieee.org
We perform a comparative study of spin-transfer-induced excitation of the gyrotropic motion
of a vortex core with either uniform or vortex spin polarizers. The microwave output voltage …