Magnetic tunnel junction logic architecture for realization of simultaneous computation and communication

Andrew Lyle, Shruti Patil, Jonathan Harms, Brian Glass, Xiaofeng Yao, David Lilja, Jian Ping Wang

Research output: Contribution to journalArticle

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Abstract

We investigated magnetic tunnel junction (MTJ)-based circuit that allows direct communication between elements without intermediate sensing amplifiers. Two- and three-input circuits that consist of two and three MTJs connected in parallel, respectively, were fabricated and are compared. The direct communication is realized by connecting the output in series with the input and applying voltage across the series connections. The logic circuit relies on the fact that a change in resistance at the input modulates the voltage that is needed to supply the critical current for spin-transfer torque switching the output. The change in the resistance at the input resulted in a voltage swing of 50-200 mV and 250-300 mV for the closest input states for the three and two input designs, respectively. The two input logic gate realizes the AND, NAND, NOR, and OR logic functions. The three-input logic function realizes the majority, AND, NAND, NOR, and OR logic operations.

Original languageEnglish (US)
Article number6028204
Pages (from-to)2970-2973
Number of pages4
JournalIEEE Transactions on Magnetics
Volume47
Issue number10
DOIs
StatePublished - Oct 1 2011

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Keywords

  • Magnetic logic
  • magnetic tunnel junction (MTJ)
  • spin logic
  • spin-polarized current
  • spin-torque transfer (STT)

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