Browsing by Author "Lakew, Tadesse"
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Item Review of Giant Magnetoresistance in Ferromagnetic Crystals(Addis Ababa University, 2016-09) Lakew, Tadesse; Senbeta, Teshome (PhD)This project contains a brief review of the giant magnetoresistance in ferromagnetic crystals, the transport properties of ferromagnets with a brief discussion of magnetic properties of crystals such as magnetization susceptibility, diamagnetism, paramag- netism, and ferromagnetism as well as the magnetization dynamics in ferromagnetic systems. Giant magnetoresistance materials have magneto transport properties which determine their suitability for applications in magnetic eld sensors, read heads, ran- dom access memories. The discovery of giant magnetoresistance has been a huge impact on our life, especially for mass data storage devices. Details of giant magne- toresistance applications, such as hard-disk read-heads, sensors and magnetic memory chips are presented. One of the important aspects of giant magnetoresistance discov- ery was that it was immediately turned into commercially available products with a giant market share. The highest storage capacity in the modern computers is at- tributed to the discovery of giant magnetoresistance. This review covered a simple model of giant magnetoresistance and dependence of it on structure and magnetic layer thickness with a brief discussion of interlayer exchange coupling and giant mag- netoresistance in magnetic multilayers including the giant magnetoresistance e ect in ferromagnets (organic semi-conductors)