Improved Magnetic Information Storage using Return-Point Memory

TL;DR

This paper introduces a novel analog magnetic storage method leveraging hysteresis loop shape, significantly reducing fluctuations in signal recovery compared to traditional methods, thus enhancing storage precision.

Contribution

The paper presents a new approach to magnetic data storage that utilizes the hysteresis loop shape for improved signal retrieval accuracy.

Findings

Fluctuations in stored signal are reduced to order 1/N.

The method outperforms traditional analog storage in fluctuation magnitude.

Enhanced precision in magnetic information retrieval.

Abstract

The traditional magnetic storage mechanisms (both analog and digital) apply an external field signal H(t) to a hysteretic magnetic material, and read the remanent magnetization M(t), which is (roughly) proportional to H(t). We propose a new analog method of recovering the signal from the magnetic material, making use of the shape of the hysteresis loop M(H). The field H, ``stored'' in a region with N domains or particles, can be recovered with fluctuations of order 1/N using the new method - much superior to the 1/sqrt{N} fluctuations in traditional analog storage.