- Giant magnetoresistance (GMR) is a phenomenon where the electrical resistance of a material change in response to a magnetic field.
- The 2007 Nobel Prize in Physics was awarded to Albert Fert and Peter Grünberg for the discovery of GMR.
- The overall resistance is relatively low for parallel alignment and relatively high for antiparallel alignment.
Applications of Giant Magnetoresistance
- The main application of GMR is in magnetic field sensors, which are used to read data in hard disk drives, biosensors, microelectromechanical systems (MEMS) and other devices.
- GMR multilayer structures are also used in magnetoresistive random-access memory (MRAM) as cells that store one bit of information.
- 17 April 2023
- Recently, researchers in the UK, led by Nobel laureate Andre Geim have found that graphene displays an anomalous giant magnetoresistance (GMR) at room temperature.