From Spinwaves to Giant Magnetoresistance (GMR) and Beyond
Presenter: Peter GrŸnberg
Published: July 2014
Age: 18-22 and upwards
Views: 683 views
Standing spinwaves and surface waves in layered magnetic structures can be used for the detection and quantitative evaluation of interlayer exchange coupling (IEC). Using this method antiferromagnetic IEC has been found in Fe/Cr/Fe layered structures. This was applied to switch the alignment of the magnetizations of the Fe films in an external field from antiparallel to parallel whereby the Giant Magnetoresistance (GMR) effect was discovered. Currently the interest focuses on ÐCurrent Induced Magnetic SwitchingÓ (CIMS) which can be understood as inverse GMR effect. For all three effects, IEC, GMR and CIMS there are many interesting applications.