Magnetization dynamics in nanomagnets has attracted broad interest since it was predicted that a dc-current flowing through a thin magnetic layer can create spin-wave excitations. These excitations are due to spin-momentum transfer, a transfer of spin angular momentum between conduction electrons and the background magnetization, that enables new types of information processing. Here we show how arrays of spin-torque nano-oscillators (STNO) can create propagating spin-wave interference patterns of use for memory and computation. Memristic transponders distributed on the thin film respond to threshold tunnel magnetoresistance (TMR) values thereby detecting the spin-waves and creating new excitation patterns. We show how groups of transponders create resonant (reverberating) spin-wave interference patterns that may be used for polychronous wave computation of arithmetic and boolean functions and information storage.
@article{arxiv.1009.4116,
title = {Spin-wave interference patterns created by spin-torque nano-oscillators for memory and computation},
author = {F. Macià and A. D. Kent and F. C. Hoppensteadt},
journal= {arXiv preprint arXiv:1009.4116},
year = {2012}
}