Superparamagnetic perpendicular magnetic tunnel junctions for true random number generators
Superparamagnetic perpendicular magnetic tunnel junctions for true random number generators
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DOI：
10.1063/1.5006422
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发表时间：
2018-05
期刊：
影响因子：
1.6
通讯作者：
Brad Parks;M. Bapna;Julianne Igbokwe;H. Almasi;Weigang Wang;S. Majetich
中科院分区：
文献类型：
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作者：
Brad Parks;M. Bapna;Julianne Igbokwe;H. Almasi;Weigang Wang;S. Majetich
超顺磁垂直磁隧道结的制造和分析用于随机数发生器。时间分辨电阻测量用作随机性统计测试中的比特流。热稳定性的电压控制能够将 60 nm 直径器件中随机位生成的平均速度调节至高达 70 kHz。在最高效的操作模式下，该器件以 600 fJ/bit 的能源成本生成随机位。窄范围的磁场将给定状态的概率从 0 调整到 1，提供了一种概率计算的方法。
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.