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Stochastic Magnetic Actuated Random Transducer Devices Based on Perpendicular Magnetic Tunnel Junctions
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- Rehm, L. (author)
- NYU, Ctr Quantum Phenomena, Dept Phys, New York, NY 10003 USA.
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- Capriata, Corrado Carlo Maria (author)
- KTH,Elektronik och inbyggda system,NYU, Ctr Quantum Phenomena, Dept Phys, New York, NY 10003 USA.
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- Misra, S. (author)
- Sandia Natl Labs, Albuquerque, NM 87185 USA.
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- NYU, Ctr Quantum Phenomena, Dept Phys, New York, NY 10003 USA Elektronik och inbyggda system (creator_code:org_t)
- American Physical Society (APS), 2023
- 2023
- English.
- In: Physical Review Applied. - : American Physical Society (APS). - 2331-7019. ; 19:2
- Journal article (peer-reviewed)
Abstract
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- True random number generators are of great interest in many computing applications, such as cryptography, neuromorphic systems, and Monte Carlo simulations. Here, we investigate perpendicular magnetic-tunnel-junction nanopillars (pMTJs) activated by short-duration (nanosecond) pulses in the ballistic limit for such applications. In this limit, a pulse can transform the Boltzmann distribution of initial free-layer magnetization states into randomly magnetized down or up states, i.e., a bit that is 0 or 1, easily determined by measurement of the tunnel resistance of the junction. It is demonstrated that bit streams with millions of events: (1) are very well approximated by a normal distribution; (2) pass multiple statistical tests for true randomness, including all the National Institute of Standards and Technology tests for random number generators with only one XOR operation; (3) can be used to create a uniform distribution of 8-bit random numbers; and (4) can have no drift in the bit probability with time. The results presented here show that pMTJs operated in the ballistic regime can generate true random numbers at around 50-MHz bit rates, while being more robust to environmental changes, such as their operating temperature, compared to other stochastic nanomagnetic devices.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
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- Misra, S.
- Smith, J. D.
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- Malman, Bartosz
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- Kent, A. D.
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