Inductively coupled circuits with spin wave bus for information processing

Alexander Khitun, Mingqiang Bao, J. Y. Lee, Kang L. Wang, Dok Won Lee, Shan X. Wang, Igor V. Roshchin

Research output: Contribution to journalReview articlepeer-review

23 Citations (Scopus)

Abstract

We describe a new approach to logic devices interconnection by the inductive coupling via a ferromagnetic film. The information among the distant devices is transmitted in a wireless manner via a magnetic field produced by spin waves propagating in the ferromagnetic film, referred to as the spin wave bus. As an alternative approach to the transistor-based architecture, logic circuits with spin wave bus do not use charge as an information carrier. A bit of information can be encoded into the phase or the amplitude of the spin wave signal. We present experimental data demonstrating inductive coupling through the 100 nm thick NiFe and CoFe films at room temperature. The performance of logic circuits with spin wave bus is illustrated by numerical modeling based on the experimental data. Potentially, logic circuits with spin wave bus may resolve the interconnect problem and provide "wireless" read-in and read-out. Another expected benefit is in the enhanced logic functionality. A set of "NOT," "AND," and "OR" logic gates can be realized in one device structure. The coupling between the circuits and the spin wave bus can be controlled. We present the results of numerical simulations showing the controllable switching of a bi-stable logic cell inductively coupled to the spin wave bus. The shortcomings and limitations of circuits with spin wave bus are also discussed.

Original languageEnglish
Pages (from-to)24-34
Number of pages11
JournalJournal of Nanoelectronics and Optoelectronics
Volume3
Issue number1
DOIs
Publication statusPublished - 2008 Mar

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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