Normalization and electronic circuit correction for magnetic tunnel junction sensor performances comparison

TL;DR

This paper introduces a theoretical correction model for MTJ sensor noise and performance comparison, enabling standardized evaluation across different studies by normalizing and correcting output signals.

Contribution

The paper presents a novel model that corrects and normalizes MTJ sensor outputs, facilitating universal performance comparison across various research results.

Findings

The correction factor improves noise voltage accuracy.

Normalization allows fair comparison of MTJ sensor performances.

Model validated on different circuit configurations.

Abstract

In this manuscript we propose a theoretical model where the magneto-resistive elements are modelled as fluctuating resistances to correct the output voltage noise of tunnel magnetic junction (MTJ) from standard electronic circuits. This model is validated on single elements, partial and full Wheatstone bridge circuits, giving rise to a correction factor affecting the output noise voltage as well as sensitivity values. Combining the correction factor and a normalization by the number of MTJs pillars and the pillar surface, we show that the performances extracted by this method allow universal comparison between any results from literature.