Ultra-Fast SOT-MRAM Cell with STT Current for Deterministic Switching

2017 ◽  
Author(s):  
Behzad Zeinali ◽  
Jens K. Madsen ◽  
Praveen Raghavan ◽  
Farshad Moradi
Keyword(s):  
Deterministic Switching

scholarly journals Reducing Dzyaloshinskii-Moriya interaction and field-free spin-orbit torque switching in synthetic antiferromagnets

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Ruyi Chen ◽  
Qirui Cui ◽  
Liyang Liao ◽  
Yingmei Zhu ◽  
Ruiqi Zhang ◽  
...  
Keyword(s):  
Domain Wall ◽  
Tunnel Junctions ◽  
Low Power Consumption ◽  
Stray Field ◽  
Magnetic Memory ◽  
Spin Orbit ◽  
Theoretic Analysis ◽  
Spintronic Devices ◽  
Deterministic Switching ◽  
Moriya Interaction

AbstractPerpendicularly magnetized synthetic antiferromagnets (SAF), possessing low net magnetization and high thermal stability as well as easy reading and writing characteristics, have been intensively explored to replace the ferromagnetic free layers of magnetic tunnel junctions as the kernel of spintronic devices. So far, utilizing spin-orbit torque (SOT) to realize deterministic switching of perpendicular SAF have been reported while a large external magnetic field is typically needed to break the symmetry, making it impractical for applications. Here, combining theoretic analysis and experimental results, we report that the effective modulation of Dzyaloshinskii-Moriya interaction by the interfacial crystallinity between ferromagnets and adjacent heavy metals plays an important role in domain wall configurations. By adjusting the domain wall configuration between Bloch type and Néel type, we successfully demonstrate the field-free SOT-induced magnetization switching in [Co/Pd]/Ru/[Co/Pd] SAF devices constructed with a simple wedged structure. Our work provides a practical route for utilization of perpendicularly SAF in SOT devices and paves the way for magnetic memory devices with high density, low stray field, and low power consumption.

scholarly journals Toward Deterministic Switching in Ferroelectric Systems: Insight Gained from In Situ TEM

2015 ◽  
Vol 21 (S3) ◽  
pp. 1347-1348
Author(s):  
James Hart ◽  
Michael Jablonski ◽  
Andrew Lang ◽  
Anoop Damadoran ◽  
Shi Liu ◽  
...  
Keyword(s):  
In Situ Tem ◽  
Deterministic Switching

scholarly journals Deterministic Switching of Ferroelectric Bubble Nanodomains

2019 ◽  
Vol 29 (28) ◽  
pp. 1808573 ◽  
Author(s):  
Qi Zhang ◽  
Sergei Prokhorenko ◽  
Yousra Nahas ◽  
Lin Xie ◽  
Laurent Bellaiche ◽  
...  
Keyword(s):  
Deterministic Switching

Randomized switching in the two-envelope problem

2009 ◽  
Vol 465 (2111) ◽  
pp. 3309-3322 ◽  
Author(s):  
Mark D. McDonnell ◽  
Derek Abbott
Keyword(s):  
Probability Theory ◽  
Decision Theory ◽  
New Approach ◽  
Switching Strategy ◽  
It Impacts ◽  
State Switching ◽  
Economics Literature ◽  
First Time ◽  
Deterministic Switching

The two-envelope problem is a conundrum in decision theory that is subject to longstanding debate. It is a counterintuitive problem of decidability between two different states, in the presence of uncertainty, where a player’s payoff must be maximized in some fashion. The problem is a significant one as it impacts on our understanding of probability theory, decision theory and optimization. It is timely to revisit this problem, as a number of related two-state switching phenomena are emerging in physics, engineering and economics literature. In this paper, we discuss this wider significance, and offer a new approach to the problem. For the first time, we analyse the problem by adopting Cover’s switching strategy—this is where we randomly switch states with a probability that is a smoothly decreasing function of the observed value of one state. Surprisingly, we show that the player’s payoff can be increased by this strategy. We also extend the problem to show that a deterministic switching strategy, based on a thresholded decision once the amount in an envelope is observed, is also workable.

Deterministic Switching of Polarization Vortices in Compositionally Graded Ferroelectrics Using a Mechanical Field

2019 ◽  
Vol 11 (5) ◽  
Author(s):  
Le Van Lich ◽  
Tinh Quoc Bui ◽  
Takahiro Shimada ◽  
Takayuki Kitamura ◽  
Trong-Giang Nguyen ◽  
...  
Keyword(s):  
Mechanical Field ◽  
Deterministic Switching

scholarly journals Numerical Analysis of Deterministic Switching of a Perpendicularly Magnetized Spin-Orbit Torque Memory Cell

2020 ◽  
pp. 1-1
Author(s):  
Roberto Lacerda de Orio ◽  
Johannes Ender ◽  
Simone Fiorentini ◽  
Wolfgang Goes ◽  
Siegfried Selberherr ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Memory Cell ◽  
Spin Orbit ◽  
Deterministic Switching
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