Spin torque oscillator frequency versus magnetic field angle: The prospect of operation beyond 65 GHz

2009 ◽  
Vol 94 (10) ◽  
pp. 102507 ◽  
Author(s):  
Stefano Bonetti ◽  
Pranaba Muduli ◽  
Fred Mancoff ◽  
Johan Åkerman
Keyword(s):  
Magnetic Field ◽  
Spin Torque ◽  
Oscillator Frequency

scholarly journals Strong linewidth variation for spin-torque nano-oscillators as a function of in-plane magnetic field angle

2008 ◽  
Vol 78 (2) ◽  
Author(s):  
K. V. Thadani ◽  
G. Finocchio ◽  
Z.-P. Li ◽  
O. Ozatay ◽  
J. C. Sankey ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Spin Torque

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

2015 ◽  
Vol 118 (5) ◽  
pp. 053903 ◽  
Author(s):  
Tomohiro Taniguchi ◽  
Takahiro Ito ◽  
Yasuhiro Utsumi ◽  
Sumito Tsunegi ◽  
Hitoshi Kubota
Keyword(s):  
Magnetic Field ◽  
Spin Torque ◽  
Stable Oscillation

Self-Injection Locking of a Spin Torque Nano-Oscillator to Magnetic Field Feedback

2018 ◽  
Vol 10 (2) ◽  
Author(s):  
Hanuman Singh ◽  
A. Bose ◽  
S. Bhuktare ◽  
A. Fukushima ◽  
K. Yakushiji ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Injection Locking ◽  
Spin Torque

scholarly journals Giant nonlinear damping in nanoscale ferromagnets

2019 ◽  
Vol 5 (10) ◽  
pp. eaav6943 ◽  
Author(s):  
I. Barsukov ◽  
H. K. Lee ◽  
A. A. Jara ◽  
Y.-J. Chen ◽  
A. M. Gonçalves ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Nanoparticles ◽  
High Resolution ◽  
Nonlinear Damping ◽  
Spin Torque ◽  
Magnetic Dynamics ◽  
Magnetic Damping ◽  
Microwave Magnetic Field ◽  
Geometric Confinement ◽  
Phenomenological Constant

Magnetic damping is a key metric for emerging technologies based on magnetic nanoparticles, such as spin torque memory and high-resolution biomagnetic imaging. Despite its importance, understanding of magnetic dissipation in nanoscale ferromagnets remains elusive, and the damping is often treated as a phenomenological constant. Here, we report the discovery of a giant frequency-dependent nonlinear damping that strongly alters the response of a nanoscale ferromagnet to spin torque and microwave magnetic field. This damping mechanism originates from three-magnon scattering that is strongly enhanced by geometric confinement of magnons in the nanomagnet. We show that the giant nonlinear damping can invert the effect of spin torque on a nanomagnet, leading to an unexpected current-induced enhancement of damping by an antidamping torque. Our work advances the understanding of magnetic dynamics in nanoscale ferromagnets and spin torque devices.

scholarly journals Microwave magnetic field modulation of spin torque oscillator based on perpendicular magnetic tunnel junctions

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Witold Skowroński ◽  
Jakub Chęciński ◽  
Sławomir Ziętek ◽  
Kay Yakushiji ◽  
Shinji Yuasa
Keyword(s):  
Magnetic Field ◽  
Microwave Field ◽  
Magnetic Tunnel Junction ◽  
Communication Technologies ◽  
Field Application ◽  
Spin Torque ◽  
Inductive Loop ◽  
High Data ◽  
Microwave Magnetic Field ◽  
Field Modulation

AbstractModulation of a microwave signal generated by the spin-torque oscillator (STO) based on a magnetic tunnel junction (MTJ) with perpendicularly magnetized free layer is investigated. Magnetic field inductive loop was created during MTJ fabrication process, which enables microwave field application during STO operation. The frequency modulation by the microwave magnetic field of up to 3 GHz is explored, showing a potential for application in high-data-rate communication technologies. Moreover, an inductive loop is used for self-synchronization of the STO signal, which after field-locking, exhibits significant improvement of the linewidth and oscillation power.

Sidewall oxide effects on spin-torque- and magnetic-field-induced reversal characteristics of thin-film nanomagnets

2008 ◽  
Vol 7 (7) ◽  
pp. 567-573 ◽  
Author(s):  
O. Ozatay ◽  
P. G. Gowtham ◽  
K. W. Tan ◽  
J. C. Read ◽  
K. A. Mkhoyan ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Thin Film ◽  
Spin Torque

scholarly journals Role of Magnetic Field in Self-Oscillation of Nanomagnet Excited by Spin Torque

2014 ◽  
Vol 50 (11) ◽  
pp. 1-4 ◽  
Author(s):  
Tomohiro Taniguchi ◽  
Shingo Tamaru ◽  
Hiroko Arai ◽  
Sumito Tsunegi ◽  
Hitoshi Kubota ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Spin Torque

Theoretical Sensitivity in Magnetic Field Sensors using a Spin-torque Oscillator

2015 ◽  
Author(s):  
Y. Suzuki ◽  
A. Tulapurkar ◽  
H. Tomita ◽  
E. Tamura ◽  
H. Kubota ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Spin Torque ◽  
Magnetic Field Sensors ◽  
Theoretical Sensitivity
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