Nanomagnetic Boolean Logic -- The Tempered (and Realistic) Vision

TL;DR

This paper critically examines the concept of nanomagnetic Boolean logic, highlighting misconceptions, flaws, and realistic challenges that have hindered its development and commercialization over the past two decades.

Contribution

It provides a tempered, realistic perspective on nanomagnetic logic, addressing misconceptions and identifying key obstacles to its practical implementation.

Findings

Many proposed nanomagnetic logic ideas are flawed or unrealistic.

Significant technical and practical challenges remain for nanomagnetic logic to become viable.

The field needs a more realistic assessment of its limitations and potential.

Abstract

The idea of nanomagnetic Boolean logic was advanced more than two decades ago. It envisaged the use of nanomagnets with two stable magnetization orientations as the primitive binary switch for implementing logic gates and ultimately combinational/sequential circuits. Enthusiastic proclamations of how nanomagnetic logic will eclipse traditional (transistor-based) logic circuits proliferated the applied physics literature. Two decades later there is not a single viable nanomagnetic logic chip in sight, let alone one that is a commercial success. In this perspective article, I offer my reasons on why this has come to pass. I present a realistic and tempered vision of nanomagnetic logic, pointing out many misconceptions about this paradigm, flaws in some proposals that appeared in the literature, shortcomings, and likely pitfalls that might stymie progress in this field.