scholarly journals Magnetization dynamics in spin torque nano-oscillators: Vortex state versus uniform state

2009 ◽  
Vol 80 (5) ◽  
Author(s):  
R. Lehndorff ◽  
D. E. Bürgler ◽  
S. Gliga ◽  
R. Hertel ◽  
P. Grünberg ◽  
...  
Keyword(s):  
Vortex State ◽  
Spin Torque ◽  
Magnetization Dynamics ◽  
Uniform State

SNR Improvement of Envelope Demodulation Using Two Temporal Magnetization Dynamics From Dual-Spin-Torque Oscillator

2018 ◽  
Vol 54 (11) ◽  
pp. 1-4 ◽  
Author(s):  
Y. Nakamura ◽  
M. Nishikawa ◽  
H. Osawa ◽  
Y. Okamoto ◽  
T. Kanao ◽  
...  
Keyword(s):  
Spin Torque ◽  
Magnetization Dynamics ◽  
Snr Improvement

scholarly journals Magnetization Dynamics in a Perpendicular Anisotropy Free Layer under a Spin Torque Effect with Crossed Polarization

2020 ◽  
Vol 25 (1) ◽  
pp. 54
Author(s):  
Nafeesa Rahman ◽  
Rachid Sbiaa
Keyword(s):  
Tunnel Junction ◽  
Magnetic Tunnel Junction ◽  
Film Plane ◽  
Spin Torque ◽  
Spin Angular Momentum ◽  
Perpendicular Anisotropy ◽  
Free Layer ◽  
Magnetization Dynamics ◽  
Magnetization Direction ◽  
Spin Polarized

The transfer of spin angular momentum from a spin polarized current provides an efficient way of reversing the magnetization direction of the free layer of the magnetic tunnel junction (MTJ), and while faster reversal will reduce the switching energy, this in turn will lead to low power consumption. In this work, we propose a design where a spin torque oscillator (STO) is integrated with a conventional magnetic tunnel junction (MTJ) which will assist in the ultrafast reversal of the magnetization of the free layer of the MTJ. The structure formed (MTJ stacked with STO), will have the free layer of the MTJ sandwiched between two spin polarizer layers, one with a fixed magnetization direction perpendicular to film plane (main static polarizer) and the other with an oscillatory magnetization (dynamic polarizer). The static polarizer is the fixed layer of the MTJ itself and the dynamic polarizer is the free layer of the STO.

scholarly journals A cryogenic spin-torque memory element with precessional magnetization dynamics

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
G. E. Rowlands ◽  
C. A. Ryan ◽  
L. Ye ◽  
L. Rehm ◽  
D. Pinna ◽  
...  
Keyword(s):  
Spin Torque ◽  
Magnetization Dynamics ◽  
Memory Element

Stability Analysis of Spin-Torque Nano-oscillator in the Rotating Frame

SPIN ◽  
2019 ◽  
Vol 09 (03) ◽  
pp. 1950008
Author(s):  
HaoHsuan Chen ◽  
Lang Zeng ◽  
ChingMing Lee ◽  
Weisheng Zhao
Keyword(s):  
High Performance ◽  
Electrical Current ◽  
Nonstationary Process ◽  
Laboratory Frame ◽  
Spin Torque ◽  
Rotating Frame ◽  
Magnetization Dynamics ◽  
Applied Current ◽  
Frequency Tunability ◽  
Out Of Plane

Spin-torque nano-oscillators (STNOs) have become one of the emerging and novel microwave devices with the high performance and tunability of GHz range frequency. The nanopillar structure with an out-of-plane (OP) spin polarizer and an in-plane (IP) magnetized free layer (FL) has been considered as a good candidate for the STNOs. Using the local rotational coordinate transformation, a nonstationary process describing magnetization dynamics in the laboratory frame is therefore transformed into a stationary one in the rotating frame. In this way, the state phase diagram of this type of STNOs is well established as a function of an applied current and external field, which is also evidenced by the macrospin simulations. Also, we show that the frequency tunability of the STNOs through electrical current can be well elevated by applying a static magnetic field anti-parallel to the spin-polarizer vector.

scholarly journals Broadband probing magnetization dynamics of the coupled vortex state permalloy layers in nanopillars

2012 ◽  
Vol 100 (26) ◽  
pp. 262406 ◽  
Author(s):  
A. A. Awad ◽  
A. Lara ◽  
V. Metlushko ◽  
K. Y. Guslienko ◽  
F. G. Aliev
Keyword(s):  
Vortex State ◽  
Magnetization Dynamics

scholarly journals Ideal memristor based on viscous magnetization dynamics driven by spin torque

2020 ◽  
Vol 117 (10) ◽  
pp. 103501
Author(s):  
Guanxiong Chen ◽  
Sergei Ivanov ◽  
Sergei Urazhdin
Keyword(s):  
Spin Torque ◽  
Magnetization Dynamics

Unidirectional response in spin-torque driven magnetization dynamics

2018 ◽  
Author(s):  
Joseph Sklenar ◽  
Wei Zhang ◽  
Matthias Benjamin Jungfleisch ◽  
Axel Hoffmann
Keyword(s):  
Spin Torque ◽  
Magnetization Dynamics

Spin torque-induced magnetization dynamics in giant magnetoresistance devices with Heusler alloy layers

2015 ◽  
Vol 48 (16) ◽  
pp. 164010 ◽  
Author(s):  
T Seki ◽  
H Yako ◽  
T Yamamoto ◽  
T Kubota ◽  
Y Sakuraba ◽  
...  
Keyword(s):  
Heusler Alloy ◽  
Giant Magnetoresistance ◽  
Spin Torque ◽  
Magnetization Dynamics
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