Non-volatile magnonic logic circuits engineering

Abstract

We propose a concept of magnetic logic circuits engineering, which takes an advantage of magnetization as a computational state variable and exploits spin waves for information transmission. The circuits consist of magneto-electric cells connected via spin wave buses. We present the result of numerical modeling showing the magnetoelectric cell switching as a function of the amplitude as well as the phase of the spin wave. The phase-dependent switching makes it possible to engineer logic gates by exploiting spin wave buses as passive logic elements providing a certain phase-shift to the propagating spin waves. We present a library of logic gates consisting of magnetoelectric cells and spin wave buses providing 0 or π phase shifts. The utilization of phases in addition to amplitudes is a powerful tool which let us construct logic circuits with a fewer number of elements than required for CMOS technology. As an example, we present the design of the magnonic Full Adder Circuit comprising only 5 magnetoelectric cells. The proposed concept may provide a route to more functional wave-based logic circuitry with capabilities far beyond the limits of the traditional transistor-based approach.2

Spin wave eigenmodes in transversely magnetized thin film ferromagnetic wires

“…More recently, ferromagnetic nanowires proved to be useful for studies of inverse spin Hall effect 19 and spin orbit torques [20][21][22][23] . Furthermore, several realizations of spintronic logic gates [27][28][29][30][31][32] and spin wave guides 33 based on ferromagnetic nanowires have been recently proposed. Detailed understanding of magneto-transport and magneto-dynamic effects in ferromagnetic nanowires rely on the quantitative description of spin waves in this important confined geometry.…”

Realization of a spin-wave multiplexer

“…R ecently, several new concepts were presented that associated with a novel magnonic approach for information transport and processing [1][2][3][4][5][6][7] . Magnons are the spin-wave excitation quanta of magnetic materials.…”

Micromagnetic simulations of magnetoelastic spin wave excitation in scaled magnetic waveguides

“…Such magnetoelectric spin wave transducers can therefore be considered as key elements of future low-power magnonic devices. [7][8][9][10] Magnetoelectric excitation and control of ferromagnetic resonance (FMR) as well as propagating spin waves have been studied in both multiferroic materials, such as BiFeO 3 , 6 and magnetoelectric compounds. [11][12][13][14][15][16][17] Magnetoelectric compounds consist of piezoelectric and magnetostrictive layers coupled via strain.…”