Nanomagnet logic gate with programmable-electrical input

作者：Siddiq Mohammad Abu Jafar^*; Butler Katherine; Dey Himadri; Shah Faisal Ahmed; Li Peng; Varga Edit; Orlov Alexei; Csaba Gyorgy; Niemier Michael; Porod Wolfgang; Bernstein Gary Hirshon

来源：IEEE Transactions on Magnetics, 2014, 50(11): 1-4.

DOI：10.1109/TMAG.2014.2325853

• Copper conductors
• Electrical inputs
• Flux concentrator
• Logic operations
• Micromagnetic simulations
• Nanomagnet logic (NML)
• On-chip integration
• programmable input

We report a clock/logic/input structure for nanomagnet logic (NML) that implements a two-input slant-based OR gate with both clocking and input programming through current pulses. The clock line is a copper conductor embedded in a Si substrate with CoFe as a flux concentrator. Inputs are implemented with overlaid and dedicated bias lines. The programmability of such inputs allows us to test the same NML device for all possible input combinations. Results are determined by magnetic force microscopy. This scheme is easy to fabricate and can control thicker (20-30 nm) input nanomagnets. Close proximity of bias lines in such a structure allows us to investigate the effect of overlapping bias fields. We also report micromagnetic simulations that relate the slant in the output magnet to the dimensions of the input nanomagnets required to effect proper logic operation.

• 出版日期2014