Proposal for a spintronic femto-Tesla magnetic field sensor

TL;DR

This paper proposes a novel spintronic quantum wire-based magnetic field sensor capable of detecting extremely weak magnetic fields with high sensitivity at cryogenic and room temperatures, with potential applications across various scientific and military fields.

Contribution

It introduces a new design for a spintronic magnetic sensor using quantum wires, achieving femto-Tesla sensitivity at different temperatures, which is a significant advancement over existing sensors.

Findings

Sensitivity of ~1 femto-Tesla/√Hz at 4.2 K

Sensitivity of ~80 femto-Tesla/√Hz at room temperature

Potential applications in magnetometry and quantum technologies

Abstract

We propose a spintronic magnetic field sensor, fashioned out of quantum wires, which may be capable of detecting very weak magnetic fields with a sensitivity of ~ 1 femto-Tesla per root Hertz at a temperature of 4.2 K and ~ 80 femto-Tesla per root Hertz at room temperature. Such sensors have applications in magnetometry, quantum computing, solid state nuclear magnetic resonance, magneto-encephalography, mine detection, ground incursion detection and anti-submarine warfare.