Tunable Random Telegraph Noise in Stable Perpendicular Magnetic Tunnel Junctions for Unconventional Computing

Abstract

We demonstrate that thermally stable perpendicular magnetic tunnel junctions (pMTJs), widely used in spin-transfer torque magnetic random-access memory, can be actuated with nanosecond pulses to exhibit tunable stochastic behavior. This actuated-stochastic tunnel junction (A-sMTJ) concept produces random telegraph noise, with control over fluctuation rate and probability bias. The device response is shown to be consistent with a Poisson process, with fluctuation rates tunable over more than two orders of magnitude, with average state dwell times varying from 29 ns to greater than 2.3 microseconds. These results establish A-sMTJs as a versatile platform for integrating deterministic, stochastic, and in-memory functionality on a single chip, advancing the development of probabilistic, neuromorphic, and unconventional computing systems.

7 pages, 5 figures

References in corpus (12)

• Spin-transfer pulse switching: From the dynamic to the thermally activated regime
• Demonstration of nanosecond operation in stochastic magnetic tunnel junctions
• Roadmap for Unconventional Computing with Nanotechnology
• Sub-nanosecond spin-torque switching of perpendicular magnetic tunnel junction nanopillars at cryogenic temperatures
• Stochastic magnetic actuated random transducer devices based on perpendicular magnetic tunnel junctions
• All-to-all reconfigurability with sparse and higher-order Ising machines
• Thermal effects in spin torque switching of perpendicular magnetic tunnel junctions at cryogenic temperatures
• One Trillion True Random Bits Generated with a Field Programmable Gate Array Actuated Magnetic Tunnel Junction
• A True Random Number Generator for Probabilistic Computing using Stochastic Magnetic Actuated Random Transducer Devices
• Solving combinatorial optimization problems through stochastic Landau-Lifshitz-Gilbert dynamical systems
• High-Speed Tunable Generation of Random Number Distributions Using Actuated Perpendicular Magnetic Tunnel Junctions
• Superparamagnetic and Stochastic-Write Magnetic Tunnel Junctions for High-Speed True Random Number Generation in Advanced Computing