Basic component in spintronics, used in both giant magnetoresistance
Describes how giant magnetoresistance was used in magnetoresistive disk heads in the 90's providing a huge improvement in disk storage density over the pre-existing inductive sensors
More comments at: Video "Introduction to Spintronics by Aurélien Manchon (2020)".
Describes how how spin-transfer torque was used in magnetoresistive RAM
More comments at: Video "Introduction to Spintronics by Aurélien Manchon (2020)".