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Nanotechnology. 2011 Mar 4;22(9):095301. doi: 10.1088/0957-4484/22/9/095301. Epub 2011 Jan 24.

Spin-wave interference patterns created by spin-torque nano-oscillators for memory and computation.

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Department of Physics, New York University, New York, NY 10003, USA.


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 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 values, thereby allowing spin-wave detection 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 and information storage.

[Indexed for MEDLINE]

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