Spin-Orbit-Torque-Based Spin-Dice: A True Random-Number Generator

New three-terminal spin dice, a true random number generator, are proposed. The design utilizes spin-orbit torque to hold a bi-stable perpendicular magnetic anisotropy nanomagnet in meta-stability and uses thermal noise as an entropy source to bias the magnet off its metastable state. Once the magne...

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Bibliographic Details
Published in:IEEE magnetics letters 2015, Vol.6, p.1-4
Main Authors: Kim, Yusung, Fong, Xuanyao, Roy, Kaushik
Format: Article
Language:English
Subjects:
Entropy
Generators
Hall effect
Magnetic device
Magnetic devices
Magnetic tunneling
Magnetization
Nanostructure
Random number generation
Random numbers
random-number generation (RNG)
Simulation
spin Hall effect (SHE)
spin-orbit torque (SOT)
Thermal noise
Torque
Tunnel junctions
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Summary:New three-terminal spin dice, a true random number generator, are proposed. The design utilizes spin-orbit torque to hold a bi-stable perpendicular magnetic anisotropy nanomagnet in meta-stability and uses thermal noise as an entropy source to bias the magnet off its metastable state. Once the magnetization is tilted, the built-in anisotropy field of the magnet relaxes the magnetization to the stable state, producing a random bit whose value is determined solely by the thermal noise. Our proposed spin-dice are able to simultaneously achieve high throughput, low-energy, and ease of design even in the presence of process variations. Based on our simulations, our three-terminal spin-dice have the potential to outperform recently proposed spin-dice based on two-terminal magnetic tunnel junctions.
ISSN:1949-307X
1949-3088
DOI:10.1109/LMAG.2015.2496548