Magnetoresistance

• 13 Apr 2023

Recently, researchers in the UK have discovered that graphene, a single-atom-thick layer of carbon atoms, displays an anomalous Giant Magnetoresistance (GMR) at room temperature.

• GMR is a property of materials where electrical resistance is affected by adjacent magnetic fields.
• Graphene-based devices are commonly used to sense magnetic fields.
• Researchers found that a graphene-based device could sense magnetic fields without needing to be cooled to very low temperatures.
• This is unlike conventional devices used for the same purpose.
• The magnetoresistance observed in the graphene-based device was almost 100 times higher than other known semimetals in this magnetic field range.
• This discovery could be used in applications that require magnetic-field sensing in extreme conditions.