Superparamagnetic perpendicular magnetic tunnel junctions for true random number generators

Bradley Parks, Mukund Bapna, Julianne Igbokwe, Hamid Almasi, Weigang Wang, Sara A. Majetich

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

Superparamagnetic perpendicular magnetic tunnel junctions are fabricated and analyzed for use in random number generators. Time-resolved resistance measurements are used as streams of bits in statistical tests for randomness. Voltage control of the thermal stability enables tuning the average speed of random bit generation up to 70 kHz in a 60 nm diameter device. In its most efficient operating mode, the device generates random bits at an energy cost of 600 fJ/bit. A narrow range of magnetic field tunes the probability of a given state from 0 to 1, offering a means of probabilistic computing.

Original languageEnglish (US)
Article number055903
JournalAIP Advances
Volume8
Issue number5
DOIs
StatePublished - May 1 2018

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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