High-Density Physical Random Number Generator Using Spin Signals in Multidomain Ferromagnetic Layer

Figure 5

Generation of multiple random bits. (a) Schematic diagram of method for generating multiple random bits. Each signal is extracted after every XOR operation. The number of output signals follows the relation nC₂, where C is combination. (b) The evaluation of the random bits generated simultaneously in five 30 nm pMTJ pillars. The XOR data measured for five cells are 10 in number (5C₂); their numbers are indicated on the -axis of the graph. (Inset) SEM image of the pMTJ array with 30 nm junction and 200 nm pitch.

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