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 …

Microwave signal sources based on spin-torque nano-oscillators

OV Prokopenko - Ukrainian journal of physics, 2015 - ujp.bitp.kiev.ua
The spin-transfer torque (STT) effect provides a new method of manipulating the
magnetization in nano-scale objects. According to the STT effect, a bias dc current traversing …

[HTML][HTML] Modeling of magnetization precession in spin-torque nano-oscillators with a tilted polarizer

G Lv, H Zhang, X Cao, Y Liu, Z Hou, Y Qin, G Li… - AIP Advances, 2015 - pubs.aip.org
The spin-torque induced magnetization precession dynamics are studied in a spin-valve
with a tilted spin polarizer. Macrospin simulations demonstrate that the frequency of …

[HTML][HTML] Oscillation characteristics of zero-field spin transfer oscillators with field-like torque

YY Guo, HB Xue, ZJ Liu - AIP Advances, 2015 - pubs.aip.org
We theoretically investigate the influence of the field-like spin torque term on the oscillation
characteristics of spin transfer oscillators, which are based on MgO magnetic tunnel …

Magnetic vortex gyration affected by Dzyaloshinskii–Moriya interaction

YM Luo, C Zhou, C Won, YZ Wu - Journal of Applied Physics, 2015 - pubs.aip.org
The effect of the Dzyaloshinskii–Moriya interaction (DMI) on magnetic vortex gyration is
investigated systematically through micromagnetic simulations. Our results show that the …

Stable oscillation in spin torque oscillator excited by a small in-plane magnetic field

T Taniguchi, T Ito, Y Utsumi, S Tsunegi… - Journal of Applied …, 2015 - pubs.aip.org
Theoretical conditions to excite self-oscillation in a spin torque oscillator consisting of a
perpendicularly magnetized free layer and an in-plane magnetized pinned layer are …

Confinement of Magnetic Vortex and Domain Walls in Dipolar-Coupled Concentric Nanocylinders

LL Oliveira, MS Nunes, CM Souza… - IEEE Transactions …, 2015 - ieeexplore.ieee.org
We report a theoretical study of the magnetic phases of core-shell nanocylinders, consisting
of a Py cylindrical core, dipolar coupled to a coaxial Fe cylindrical shell. A few nanometers …

Vortex dynamics in Co-Fe-B magnetic tunnel junctions in presence of defects

M Kuepferling, S Zullino, A Sola… - Journal of Applied …, 2015 - pubs.aip.org
We investigate the frequency of thermally excited vortex oscillations in Co-Fe-B magnetic
tunnel junction (MTJ) pillars in the presence of defects. Under a variable in-plane magnetic …

Observation of vortex dynamics in arrays of nanomagnets

W Yu, PS Keatley, P Gangmei, MK Marcham… - Physical Review B, 2015 - APS
Vortex dynamics within arrays of square ferromagnetic nanoelements have been studied by
time-resolved scanning Kerr microscopy (TRSKM), while x-ray photoemission electron …

Temperature dependence of microwave oscillations in magnetic tunnel junctions with a perpendicularly magnetized free layer

P Guo, J Feng, H Wei, X Han, B Fang, B Zhang… - Applied Physics …, 2015 - pubs.aip.org
We experimentally study the temperature dependence of the spin-transfer-torque-induced
microwave oscillations in MgO-based magnetic tunnel junction nanopillars with a …