Hall effect spintronics for gas detection

Abstract

We present the concept of magnetic gas detection by the Extraordinary Hall effect (EHE). The technique is compatible with the existing conductometric gas detection technologies and allows simultaneous measurement of two independent parameters: resistivity and magnetization affected by the target gas. Feasibility of the approach is demonstrated by detecting low concentration hydrogen using thin CoPd films as the sensor material. The Hall effect sensitivity of the optimized samples exceeds 240% per 104 ppm at hydrogen concentrations below 0.5% in the hydrogen/nitrogen atmosphere, which is more than two orders of magnitude higher than the sensitivity of the conductance detection.

References in corpus (4)

• Anomalous Hall effect
• Metallic spintronic nanofilm as a hydrogen sensor
• Effects of hydrogen/deuterium absorption on the magnetic properties of Co/Pd multilayers
• MegaOhm Extraordinary Hall effect in oxidized CoFeB

Cited by in corpus (6)

• Detection of hydrogen by the extraordinary Hall effect in CoPd alloys
• Kinetics of the lattice response to hydrogen absorption in thin Pd and CoPd films
• Manipulation of Inverse Spin Hall Effect in Palladium by Absorption of Hydrogen Gas
• Resistivity testing of palladium dilution limits in CoPd alloys for hydrogen storage
• Modulation of Spin Seebeck Effect by Hydrogenation
• Hydrogen-Induced Sign Reversal in Magnetic Hysteresis Evolution of CoPd Alloys and Co/Pd Multilayers