Large-amplitude, narrow-linewidth microwave emission in a dual free-layer MgO spin-torque oscillator

2014 ◽  
Vol 105 (18) ◽  
pp. 182406 ◽  
Author(s):  
Tazumi Nagasawa ◽  
Kiwamu Kudo ◽  
Hirofumi Suto ◽  
Koichi Mizushima ◽  
Rie Sato
Keyword(s):  
Large Amplitude ◽  
Microwave Emission ◽  
Spin Torque ◽  
Narrow Linewidth ◽  
Free Layer

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.

Microwave emission power exceeding 10 μW in spin torque vortex oscillator

2016 ◽  
Vol 109 (25) ◽  
pp. 252402 ◽  
Author(s):  
Sumito Tsunegi ◽  
Kay Yakushiji ◽  
Akio Fukushima ◽  
Shinji Yuasa ◽  
Hitoshi Kubota
Keyword(s):  
Microwave Emission ◽  
Spin Torque ◽  
Emission Power

Modeling of the perpendicular polarizer-planar free layer spin torque oscillator: Micromagnetic simulations

2008 ◽  
Vol 78 (2) ◽  
Author(s):  
I. Firastrau ◽  
D. Gusakova ◽  
D. Houssameddine ◽  
U. Ebels ◽  
M.-C. Cyrille ◽  
...  
Keyword(s):  
Spin Torque ◽  
Free Layer ◽  
Micromagnetic Simulations

Observations of thermally excited ferromagnetic resonance on spin torque oscillators having a perpendicularly magnetized free layer

2014 ◽  
Vol 115 (17) ◽  
pp. 17C740 ◽  
Author(s):  
S. Tamaru ◽  
H. Kubota ◽  
K. Yakushiji ◽  
M. Konoto ◽  
T. Nozaki ◽  
...  
Keyword(s):  
Ferromagnetic Resonance ◽  
Spin Torque ◽  
Free Layer ◽  
Spin Torque Oscillators

Enhanced power of spin torque oscillators with Permalloy free layer

2017 ◽  
Author(s):  
C. Murapaka ◽  
E. Jimenez ◽  
K. Merazzo-Jaimes ◽  
A. Ruiz-Calaforra ◽  
R. Ferreira ◽  
...  
Keyword(s):  
Spin Torque ◽  
Free Layer ◽  
Spin Torque Oscillators

scholarly journals Spin-torque-induced switching in a perpendicular GMR nanopillar with a soft core inside the free layer

2009 ◽  
Vol 11 (2) ◽  
pp. 023027 ◽  
Author(s):  
Xuan Li ◽  
Zongzhi Zhang ◽  
Q Y Jin ◽  
Yaowen Liu
Keyword(s):  
Soft Core ◽  
Spin Torque ◽  
Free Layer

Spin-torque nano-oscillator based on a synthetic antiferromagnet free layer and perpendicular to plane polarizer

2013 ◽  
Vol 113 (11) ◽  
pp. 113908 ◽  
Author(s):  
I. Firastrau ◽  
L. D. Buda-Prejbeanu ◽  
B. Dieny ◽  
U. Ebels
Keyword(s):  
Spin Torque ◽  
Free Layer ◽  
Synthetic Antiferromagnet

scholarly journals Critical Field of Spin Torque Oscillator with Perpendicularly Magnetized Free Layer

2013 ◽  
Vol 6 (12) ◽  
pp. 123003 ◽  
Author(s):  
Tomohiro Taniguchi ◽  
Hiroko Arai ◽  
Sumito Tsunegi ◽  
Shingo Tamaru ◽  
Hitoshi Kubota ◽  
...  
Keyword(s):  
Critical Field ◽  
Spin Torque ◽  
Free Layer

Low-current, narrow-linewidth microwave signal generation in NiMnSb based single-layer nanocontact spin-torque oscillators

2016 ◽  
Vol 109 (22) ◽  
pp. 222403 ◽  
Author(s):  
P. Dürrenfeld ◽  
F. Gerhard ◽  
S. M. Mohseni ◽  
M. Ranjbar ◽  
S. R. Sani ◽  
...  
Keyword(s):  
Single Layer ◽  
Microwave Signal ◽  
Signal Generation ◽  
Spin Torque ◽  
Narrow Linewidth ◽  
Microwave Signal Generation ◽  
Spin Torque Oscillators
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