Giant magnetoresistance

UPSC World 17 April 2023
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Giant magnetoresistance for UPSC IAS
  • 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.

Latest news

  • 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.

Source

  1. The Hindu
Categories: Physics
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